Looking for other ways to say “best friend”? You can use words like close friend, confidant, soulmate, or ally, depending on your tone and your audience. Each one carries a slightly different meaning, so the right choice depends on whether you are writing a card, a speech, a text, or an essay.
This guide gives you 25 other ways to say “best friend,” with a clear meaning, a tone label, and an example sentence for each. You will also see when the original phrase is still the better choice, and when another word sounds warmer, funnier, or more formal.
What Does “Best Friend” Mean?
“Best friend” means the friend you are closest to. It usually describes someone you trust, spend time with, and share personal things with. Many people have more than one, and the phrase is not limited by age.
Grammatically, “best friend” is a compound noun. The word “best” is the superlative of “good,” so it already means “most good.” Do not add “most” or “more” before it.
Incorrect: “She is my most best friend.”
Correct: “She is my best friend.”
Why: “Best” is already a superlative form.
For possession, add an apostrophe: “my best friend’s house.” For plurals, use “best friends.” The phrase takes a hyphen only when it works as a modifier before a noun, as in “a best-friend moment.” Many writers skip the hyphen even then, so check your style guide.
Is It Professional/Polite to Say “Best Friend”?
It is polite, but it is informal in tone. In a wedding toast, a personal essay, or a social post, it is perfect. In a business email, a reference letter, or an academic paper, it can sound too personal.
In professional settings, other ways to say “best friend” work better. “Close friend,” “longtime friend,” or “trusted friend” keep the warmth without sounding casual.
Example: “I have known Daniel, a close friend, since university, and I can vouch for his work ethic.”
Pros and Cons of Saying “Best Friend”
Pros
- Everyone understands it, including ESL readers.
- It sounds sincere and warm.
- It works in speech and in writing.
Cons
- It can sound too general or childish in some adult contexts.
- It can feel awkward in formal writing.
- It ranks one friend above others, which may hurt feelings in a group.
These limits are why many writers look for other ways to say “best friend” that fit the moment more exactly.
Synonyms For “Best Friend”
Not every synonym means exactly the same thing. Some focus on trust (confidant), some on shared fun (partner in crime), and some on emotional depth (soulmate). Choose by tone first, then by meaning.
Other Ways to Say “Best Friend” at a Glance
| Tone | Good Options |
| Formal | close friend, confidant, trusted friend, companion |
| Neutral | true friend, lifelong friend, ally |
| Casual or slang | bestie, buddy, pal, homie, ride or die, day one |
| Emotional | soulmate, kindred spirit, heart sister/brother, forever friend |
| Playful | partner in crime, sidekick, cheerleader |
| Figurative | rock, anchor, constant, support system, inner circle |
25 Alternatives
Each entry below gives the meaning, the tone, and a natural example. Use the tone label to match the word to your reader.
1. Close Friend
Meaning: A friend you know well and trust. Tone: Neutral to formal.
This is the safest choice for most situations. It works in emails, essays, and speeches.
Example: “She is a close friend who helped me through my first year abroad.”
2. Soulmate
Meaning: Someone you connect with at a very deep level. Tone: Emotional.
Many people link this word with romance, but it can describe a platonic bond too. Add context so the reader does not misunderstand.
Example: “My cousin is my soulmate; we finish each other’s sentences.”
3. Partner in Crime
Meaning: A friend who joins you in fun, harmless mischief. Tone: Playful.
The phrase is a joke, not a real accusation. Keep it for casual writing.
Example: “Mia has been my partner in crime since we skipped gym class in ninth grade.”
4. Confidant
Meaning: A person you trust with private thoughts. Tone: Formal to literary.
Some writers use “confidante” for women, but “confidant” works for anyone.
Example: “Over the years, he became my most trusted confidant.”
5. Ride or Die
Meaning: A friend who stays loyal no matter what. Tone: Slang, informal.
It is common in US speech and social media. Avoid it in formal writing.
Example: “Priya is my ride or die; she showed up at 2 a.m. when my car broke down.”
6. Buddy
Meaning: A friendly, easygoing companion. Tone: Casual.
It is more common in US English. British speakers often say “mate” instead.
Example: “He is my buddy from the old neighborhood.”
Also, read this: Good Rest of Your Day
7. Companion
Meaning: A person who spends time with you or travels with you. Tone: Formal, slightly distant.
It can also describe a partner or a pet, so it may feel less personal than other options.
Example: “Maria was my companion on the long trip across Italy.”
8. Lifelong Friend
Meaning: A friend you have had for most of your life. Tone: Warm, neutral.
Use it only when the friendship is truly long. It highlights time, not closeness alone.
Example: “We are lifelong friends; our mothers met in the hospital.”
9. Bestie
Meaning: A short, casual form of “best friend.” Tone: Informal.
It fits texts and captions. Keep it out of formal writing.
Example: “Happy birthday to my bestie, who knows all my secrets!”
If you want a casual alternative, this is one of the most popular other ways to say “best friend” online.
10. Ally
Meaning: A person who supports you, especially in difficult times. Tone: Serious, neutral.
It stresses support over fun. It does not always suggest a close bond, so pair it with another word if you want more warmth.
Example: “When I changed careers, Sam was my strongest ally.”
11. Trusted Friend
Meaning: A friend who is honest and reliable. Tone: Formal, sincere.
This works well in references and speeches.
Example: “He remains a trusted friend and a wise advisor.”
12. Kindred Spirit
Meaning: A person who shares your values and outlook. Tone: Literary, emotional.
The friendship is about similarity, not time spent together.
Example: “I knew she was a kindred spirit when we both loved the same obscure poet.”
13. Pal
Meaning: A friendly companion. Tone: Casual, light.
It can sound a little old-fashioned, and less deep than “best friend.”
Example: “He is my pal from the chess club.”
14. Support System
Meaning: The person or people who give you emotional backing. Tone: Modern, sincere.
It describes a role rather than a name. It often refers to a group.
Example: “My best friend is my entire support system during exam season.”
15. Day One
Meaning: A friend who has been there from the very beginning. Tone: Slang, social media.
As a modifier, it is often hyphenated: “my day-one friend.”
Example: “Ali is my day one; he believed in me before anyone else did.”
16. True Friend
Meaning: A friend who stays loyal in good times and bad. Tone: Warm, neutral.
Example: “A true friend tells you the truth, even when it is hard.”
17. Homie
Meaning: A close friend, originally from the neighborhood. Tone: Slang, informal.
Use it only with people who will understand the tone. It does not suit formal writing.
Example: “That’s my homie; we grew up on the same street.”
18. Rock
Meaning: A steady person you lean on. Tone: Emotional, figurative.
Example: “Through every crisis, Hannah has been my rock.”
19. Sidekick
Meaning: A loyal companion who joins your adventures. Tone: Playful.
It can suggest the second-best role in a story, so use it only if the friend will enjoy the joke.
Example: “Every hero needs a sidekick, and I’m lucky to have Leo.”
20. Constant
Meaning: A person who is always there. Tone: Literary, sincere.
Example: “In a changing world, she has been my constant.”
21. Heart Sister/Brother
Meaning: A friend you love like family. Tone: Emotional.
Use “heart sister” or “heart brother” depending on the person. It suits cards and captions.
Example: “Zara is not my sister by blood, but she is my heart sister.”
22. Anchor
Meaning: A person who keeps you grounded. Tone: Figurative, emotional.
Example: “When life gets chaotic, Omar is my anchor.”
23. Inner Circle
Meaning: The small group of people closest to you. Tone: Neutral.
It usually names a group, so it is a weaker fit for one person.
Example: “Only my inner circle knew about the surprise.”
24. Cheerleader
Meaning: A friend who loudly supports your goals. Tone: Positive, informal.
It even works at work, where a colleague may be your “biggest cheerleader.”
Example: “My best friend is my biggest cheerleader, and she never misses my performances.”
25. Forever Friend
Meaning: A friend you expect to keep for life. Tone: Sentimental.
It suits cards, weddings, and farewell messages.
Example: “Thank you for being my forever friend.”
Conclusion
The best choice among other ways to say “best friend” depends on tone. Use “close friend” or “trusted friend” for formal writing, “bestie” or “buddy” for casual messages, and “soulmate” or “kindred spirit” for deeper emotion. Each word has its own meaning, so avoid mixing them without thinking.
Before you write, ask who will read it and how close you are to the person. Then pick from the other ways to say “best friend” listed above. A small change in wording can make your message sound warmer, funnier, or more professional.
Welcome to Grammarrich.com, your trusted source for grammar tips, writing guides, and language learning. With 5 years of experience in the grammar niche, our goal is to provide clear, accurate, and easy-to-understand content that helps everyone write with confidence.
2 thoughts on “Other Ways to Say “Best Friend”: 25 Heartfelt Alternatives”