Quick Answer: “Best friend” refers to the person you are closest to and trust most. Top alternatives include: bestie, BFF, closest friend, confidant, and soul mate.
Have you ever wanted to describe the person who knows you better than anyone, but “best friend” felt too ordinary? If so, you are not alone. This phrase appears in everyday conversation, social media, and heartfelt speeches, which makes it one of the most common yet deeply personal labels in English.
English learners and professionals often default to “best friend” because it is universally understood. However, learning alternatives to “best friend” helps you express closeness in English with more nuance, humor, and cultural awareness.
Knowing other ways to say “best friend” gives you options for every relationship and context. For example, you can be playful with a childhood companion, formal in a wedding speech, or warm in a social media caption. This guide gives you 30 practical alternatives with clear examples so you can use each one with confidence.
“The words you choose for friendship reveal how deeply you understand it.”
Quick Categories
Formal alternatives to “Best Friend”
- Closest friend
- Confidant
- Dearest friend
- Most trusted companion
Pro Tips Box: Formal alternatives suit wedding speeches, dedications, and written tributes where sincerity and polish matter .
Casual alternatives
- Bestie
- BFF
- Best mate
- Closest pal
Pro Tips Box: Casual alternatives work well in texts, social media, and relaxed conversation with peers .
Professional alternatives (for workplace closeness)
- Trusted colleague
- Close professional ally
- Longtime collaborator
- Valued partner
Pro Tips Box: Professional alternatives maintain boundaries while acknowledging a strong working bond.
Informal expressions
- Partner in crime
- Bosom buddy
- Best bud
- Right-hand man/woman
Pro Tips Box: Informal expressions in English add personality, but save them for people who appreciate playful language .
Common Mistakes
- Using “bestie” in formal writing
Example: “My bestie will be my maid of honor” in a wedding program. This sounds too casual for the occasion. - Assuming “BFF” is universally understood
Example: Using “BFF” with older generations. Some may not recognize the abbreviation . - Confusing “best friend” with “boyfriend/girlfriend”
Example: “My best friend” when you mean a romantic partner. This creates confusion in English. - Overusing “best friend” for multiple people
Example: Calling five different people your “best friend.” This dilutes the meaning of exclusivity. - Using “confidant” without understanding its depth
Example: “My confidant” for someone you just met. A confidant is someone you trust with secrets .
“True closeness needs words that match its depth.”
What Does “Best Friend” Mean?
“Best Friend” refers to the person with whom you share the closest, most trusting relationship, often someone you have known for a long time and can rely on completely . It combines the superlative “best” with “friend” to indicate the highest level of friendship.
Example Sentence: “She has been my best friend since we were five years old.”
When to Use “Best Friend”
- When introducing someone to others
- When writing a dedication or speech
- When describing your closest relationship
- When posting on social media
- When talking about childhood companions
Spoken vs Written: Common in both, especially in personal writing and conversation.
Formal vs Informal: Neutral and versatile. “Bestie” is informal, while “confidant” is formal .
Is It Professional or Polite to Say “Best Friend”?
Polite? Yes, in personal contexts.
Professional? No, in most workplaces. It is too personal for business communication.
Business-style example: “She is a trusted colleague and a valued partner on our team.”
“In professional settings, respect speaks louder than closeness.”
Pros and Cons of Using “Best Friend”
Pros:
- Universally understood
- Warm and personal
- Expresses deep connection
- Easy to use
Cons:
- Can feel childish in some contexts
- Overused on social media
- Lacks nuance for different types of closeness
- May sound exclusive to others
Other Ways to Say “Best Friend” (With Examples)
These alternatives will help you sound more fluent, confident, and natural in different situations. Use them according to tone, context, and audience to express closeness, trust, or affection.
1. Phrase: Bestie
Meaning: An informal shorthand for best friend.
Explanation: Popular and youthful.
Example Sentence: “I’m meeting my bestie for coffee later.”
Best Use: Casual conversation
Worst Use: Formal speeches
Tone: Casual, warm, friendly
Context Variability: Best in casual and social contexts .
2. Phrase: BFF
Meaning: Best Friends Forever.
Explanation: An acronym common in texting and social media.
Example Sentence: “She and I are total BFFs.”
Best Use: Social media
Worst Use: Business emails
Tone: Casual, youthful, playful
Context Variability: Best in informal contexts .
3. Phrase: Closest friend
Meaning: The friend you feel nearest to.
Explanation: Slightly more formal than “best friend.”
Example Sentence: “He is my closest friend and my greatest support.”
Best Use: Personal writing
Worst Use: Quick texts
Tone: Warm, sincere, neutral
Context Variability: Works in most contexts.
4. Phrase: Confidant
Meaning: A friend you trust with secrets.
Explanation: Formal and intimate.
Example Sentence: “She has been my confidant through every difficult moment.”
Best Use: Formal tributes
Worst Use: Casual chats
Tone: Formal, sincere, intimate
Context Variability: Ideal for formal contexts .
5. Phrase: Soul mate
Meaning: A person perfectly suited to you.
Explanation: Often used for romantic partners but also for deep friendships.
Example Sentence: “Some people are lucky enough to find a friend who is also a soul mate.”
Best Use: Emotional writing
Worst Use: Business contexts
Tone: Warm, emotional, profound
Context Variability: Works in personal contexts .
6. Phrase: Best mate
Meaning: A British and Australian term for best friend.
Explanation: Casual and regional.
Example Sentence: “He’s been my best mate since primary school.”
Best Use: UK/Australian English
Worst Use: US formal writing
Tone: Casual, friendly, regional
Context Variability: Best in casual and regional contexts .
7. Phrase: Partner in crime
Meaning: A close friend who joins you in adventures.
Explanation: Playful and humorous.
Example Sentence: “We’ve been partners in crime since college.”
Best Use: Friendly storytelling
Worst Use: Formal reports
Tone: Playful, casual, warm
Context Variability: Best in casual contexts.
8. Phrase: Bosom buddy
Meaning: A very close friend.
Explanation: Slightly old-fashioned but warm.
Example Sentence: “She is my bosom buddy from childhood.”
Best Use: Nostalgic writing
Worst Use: Modern business emails
Tone: Warm, nostalgic, informal
Context Variability: Works in personal and semi-formal contexts .
9. Phrase: Best bud
Meaning: A casual way to say best friend.
Explanation: Short and friendly.
Example Sentence: “He’s been my best bud for over a decade.”
Best Use: Casual conversation
Worst Use: Formal letters
Tone: Casual, friendly, warm
Context Variability: Best in casual contexts .
10. Phrase: Right-hand man/woman
Meaning: A trusted and indispensable friend or colleague.
Explanation: Often used in professional or leadership contexts.
Example Sentence: “She has been my right-hand woman through every challenge.”
Best Use: Professional tributes
Worst Use: Romantic contexts
Tone: Respectful, loyal, professional
Context Variability: Works in professional and personal contexts.
11. Phrase: Trusted companion
Meaning: A reliable and close friend.
Explanation: Warm and slightly formal.
Example Sentence: “He has been my trusted companion for twenty years.”
Best Use: Formal writing
Worst Use: Quick texts
Tone: Formal, warm, sincere
Context Variability: Works in formal and personal contexts.
12. Phrase: Dearest friend
Meaning: A friend held in deep affection.
Explanation: Formal and heartfelt.
Example Sentence: “To my dearest friend, thank you for everything.”
Best Use: Cards and speeches
Worst Use: Casual texts
Tone: Formal, warm, affectionate
Context Variability: Ideal for formal and personal contexts.
13. Phrase: Longtime companion
Meaning: A friend who has been with you for years.
Explanation: Emphasizes duration.
Example Sentence: “She is my longtime companion and greatest ally.”
Best Use: Formal tributes
Worst Use: Quick chats
Tone: Formal, warm, respectful
Context Variability: Works in formal and personal contexts.
14. Phrase: Bezzie
Meaning: UK slang for best friend.
Explanation: Informal and regional.
Example Sentence: “Of course I’ll tell her, she’s my bezzie.”
Best Use: UK casual conversation
Worst Use: US formal writing
Tone: Casual, regional, warm
Context Variability: Best in UK casual contexts .
15. Phrase: Ace-deuce
Meaning: A very old slang term for best friend.
Explanation: Rare and dated.
Example Sentence: “We’ve been ace-deuce since prison days.”
Best Use: Historical or slang writing
Worst Use: Modern conversation
Tone: Dated, informal, specific
Context Variability: Best in historical or specific slang contexts .
16. Phrase: Main man
Meaning: A close male friend.
Explanation: Casual and gender-specific.
Example Sentence: “He’s my main man, always has my back.”
Best Use: Casual conversation
Worst Use: Formal writing
Tone: Casual, loyal, friendly
Context Variability: Best in casual contexts .
17. Phrase: Homeboy/Homegirl
Meaning: A close friend from your neighborhood or background.
Explanation: Informal and culturally specific.
Example Sentence: “She’s my homegirl from way back.”
Best Use: Casual conversation
Worst Use: Professional emails
Tone: Casual, cultural, warm
Context Variability: Best in casual and cultural contexts .
18. Phrase: Boon companion
Meaning: A close and enjoyable friend.
Explanation: Literary and formal.
Example Sentence: “He was my boon companion through many adventures.”
Best Use: Literary writing
Worst Use: Everyday texts
Tone: Formal, literary, warm
Context Variability: Best in literary and formal contexts .
19. Phrase: Intimate
Meaning: A very close friend (formal noun).
Explanation: Rare and formal.
Example Sentence: “She is an intimate of the family.”
Best Use: Formal writing
Worst Use: Casual conversation
Tone: Formal, intimate, neutral
Context Variability: Best in formal contexts .
20. Phrase: Close ally
Meaning: A trusted friend and supporter.
Explanation: Professional and loyal.
Example Sentence: “He has been my close ally in every endeavor.”
Best Use: Professional contexts
Worst Use: Romantic writing
Tone: Professional, loyal, respectful
Context Variability: Works in professional contexts.
21. Phrase: Best friend forever
Meaning: The full phrase behind BFF.
Explanation: Emphatic and sincere.
Example Sentence: “You will always be my best friend forever.”
Best Use: Emotional messages
Worst Use: Casual texts
Tone: Warm, sincere, emotional
Context Variability: Works in personal contexts.
22. Phrase: Constant companion
Meaning: A friend who is always there.
Explanation: Warm and reliable.
Example Sentence: “She has been my constant companion through good and bad times.”
Best Use: Personal writing
Worst Use: Casual banter
Tone: Warm, loyal, sincere
Context Variability: Works in personal contexts.
23. Phrase: Kindred spirit
Meaning: A friend who shares your values and outlook.
Explanation: Literary and deep.
Example Sentence: “We are kindred spirits, always on the same wavelength.”
Best Use: Personal writing
Worst Use: Business emails
Tone: Literary, warm, profound
Context Variability: Works in personal and semi-formal contexts.
24. Phrase: Closest pal
Meaning: A very close friend (informal).
Explanation: Friendly and casual.
Example Sentence: “He’s my closest pal from university.”
Best Use: Casual conversation
Worst Use: Formal letters
Tone: Casual, friendly, warm
Context Variability: Best in casual contexts.
25. Phrase: Truest friend
Meaning: The most genuine and loyal friend.
Explanation: Emotional and sincere.
Example Sentence: “She has been my truest friend through every storm.”
Best Use: Personal tributes
Worst Use: Quick texts
Tone: Warm, sincere, emotional
Context Variability: Works in personal contexts.
26. Phrase: Ride or die
Meaning: A friend who stays loyal no matter what.
Explanation: Slang and modern.
Example Sentence: “She’s my ride or die, always has been.”
Best Use: Casual conversation
Worst Use: Formal writing
Tone: Casual, loyal, modern
Context Variability: Best in casual contexts.
27. Phrase: Better half
Meaning: Often romantic, but can refer to a closest friend.
Explanation: Affectionate and slightly playful.
Example Sentence: “My better half and I are going on a trip.”
Best Use: Romantic or close friendship
Worst Use: Formal reports
Tone: Affectionate, warm, playful
Context Variability: Works in personal contexts.
28. Phrase: Second self
Meaning: A friend so close they feel like another version of you.
Explanation: Literary and profound.
Example Sentence: “He is my second self, we think alike in every way.”
Best Use: Literary writing
Worst Use: Casual chats
Tone: Literary, profound, warm
Context Variability: Best in literary contexts.
29. Phrase: Best friend for life
Meaning: A friend who will remain close forever.
Explanation: Emphatic and sincere.
Example Sentence: “She is my best friend for life, no matter where we go.”
Best Use: Emotional messages
Worst Use: Quick replies
Tone: Warm, sincere, lasting
Context Variability: Works in personal contexts.
30. Phrase: Closest confidante
Meaning: A female friend you trust with secrets.
Explanation: Formal and intimate.
Example Sentence: “She is my closest confidante and greatest support.”
Best Use: Formal tributes
Worst Use: Casual texts
Tone: Formal, intimate, sincere
Context Variability: Ideal for formal contexts .
“Friendship is not measured by the label, but by the loyalty behind it.”
Mini Quiz / Self-Check
- Which phrase is best for a wedding speech?
a) Bestie
b) Dearest friend
c) BFF - Which phrase works best with close friends in a text?
a) Confidant
b) Bestie
c) Boon companion - You want to describe a friend you trust with secrets. Which is best?
a) Partner in crime
b) Confidant
c) Best bud - Which phrase is most formal?
a) Closest confidante
b) Bestie
c) Ride or die
Answers: 1-b, 2-b, 3-b, 4-a
Comparison Table: Top Alternatives
| Phrase | Tone | Best Use |
|---|---|---|
| Bestie | Casual, warm | Casual conversation |
| BFF | Casual, youthful | Social media |
| Closest friend | Warm, neutral | Personal writing |
| Confidant | Formal, intimate | Formal tributes |
| Soul mate | Warm, profound | Emotional writing |
| Best mate | Casual, regional | UK/Australian English |
| Partner in crime | Playful, casual | Friendly storytelling |
| Bosom buddy | Warm, nostalgic | Nostalgic writing |
| Bezzie | Casual, regional | UK casual conversation |
| Ride or die | Casual, loyal | Casual conversation |
FAQs
1. What is another way to say “best friend” formally?
Use “closest friend” or “confidant” for a polished, sincere tone .
2. Is “bestie” formal or informal?
It is informal and best suited for casual conversation, texts, and social media .
3. What does BFF stand for?
BFF stands for “Best Friends Forever” and is common in texting and social media .
4. What is a British alternative to “best friend”?
“Best mate” or “bezzie” are common British alternatives .
5. When should I avoid saying “best friend”?
Avoid it in professional settings where “trusted colleague” or “close ally” is more appropriate.
Conclusion
Learning other ways to say “best friend” gives you the flexibility to describe your closest relationships with warmth, precision, and the right tone for every context. Whether you need a formal alternative for a speech or a casual phrase for a text, the right expression honors the friendship and leaves a lasting impression.
Practice these alternatives daily and pay attention to tone awareness. The more you experiment with different expressions of closeness, the more fluent and natural you will become.
CTA: Which phrase will you try first? Share your favorite in the comments below.
See also:
- Other Ways to Say “I Hope You Have a Good Day” (30+ Examples)
- Professional English Guide: How to Sound Confident at Work
Emma Writes is a passionate content writer at ResponsCraft.com, creating practical, well-researched articles that help readers make informed decisions. She enjoys turning complex topics into clear, engaging and easy-to-follow content.