General:
* Companion: Someone you spend time with.
* Acquaintance: Someone you know casually.
* Associate: Someone you work with or share an interest with.
* Buddy: A close friend, often used informally.
* Pal: A close friend, often used informally.
* Mate: A close friend, often used in British English.
* Comrade: A close friend, often used in a political context.
* Chum: A close friend, often used informally.
Close Friends:
* Confidant: Someone you trust with secrets.
* Soulmate: Someone you feel a deep connection with.
* Best friend: Your closest and most trusted friend.
* Close friend: Someone you have a strong bond with.
* Intimate friend: Someone you share personal thoughts and feelings with.
Informal:
* Bro: A close male friend, often used informally.
* Dude: A male friend, often used informally.
* Girlfriend: A female friend, often used informally.
* Roommate: A friend who shares a living space with you.
Formal:
* Associate: A person who is connected to someone else in some way.
* Colleagues: People who work together.
* Fellow: A person who shares a common interest or profession.
Other:
* Loyal: A friend who is always there for you.
* Supportive: A friend who encourages and helps you.
* Trusted: A friend you can rely on.
The best word to use depends on the specific context and the relationship you want to describe.