35
monk(noun, clergy, god, monastic, friar)
19
buddy(noun, love, informal, familiar, associate)
18
sidekick(noun, person, individual, associate, buddy)
16
relative(noun, kinship, consanguinity, sibling)
13
chum(noun, type, love, associate, individual)
11
pal(noun, love, associate, friend, mate)
11
mate(noun, love, associate, companion, similarity)
10
sister(noun, person, associate, family, companion)
10
comrade(noun, friend, fellow man)
10
crony(noun, associate, companion, friend, mate)
10
fellow(noun, type, individual, friend, man)
10
associate(noun, fellow man)
8
blood brother(noun, expression, idiom, friend, sibling)
8
soul mate(noun, expression, friend, sister)
8
relation(noun, relative, kinship, consanguinity, sibling)
7
kin(noun, relative, kinship, sibling)
7
twin(noun, similarity, sibling)
7
bro(noun, associate, relation, companion, friend)
7
male(noun, type, individual, man, fellow)
7
uncle(noun, fellow, father, kinship, guy)
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APASmart Define. (2015). brother thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/brother/thesaurus/synonyms
ChicagoSmart Define. 2015. "brother thesaurus" https://smartdefine.org/brother/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, brother thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/brother/thesaurus/synonyms>.
MLASmart Define. "brother thesaurus" 9 September 2015. Web. 21 September 2026. <https://smartdefine.org/brother/thesaurus/synonyms>