plural of blood brother

plural of co-brother

One's colleague ("brother" in the same craft, occupation, or society). / (India) One's wife's sister's husband.

(Christianity) A layman who is a member of a brotherhood without the intention to become a priest.

plural of little brother

plural of half brother

comrade in arms (fellow combatant or soldier)

plural of brother-in-arms

(informal) A little brother.

plural of kid brother