Here are some other ways to express the idea of "best friends" in French:
* "Amis proches": This literally means "close friends".
* "Intimes": This means "intimate friends" and is more formal.
* "Confidents": This means "confidants" and emphasizes the close trust between friends.
* "Amis d'enfance": This means "childhood friends" and implies a long-lasting friendship.
The best way to say "best friends" in French will depend on the specific context and the level of formality desired.