8
brother(noun, bond, family, relative, kinship)
8
male(noun, man, fellow, guy)
8
father(noun, family, kinship, lineage)
6
unknown(adjective, characteristic, person, trait, relation)
6
fellow(noun, man, guy, male)
6
stranger(noun, person, individual, guest)
5
unfamiliar(adjective, characteristic, person, trait, relation)
5
brotherhood(noun, bond, family, relative, kinship)
5
foreigner(noun, person, individual, guest, stranger)
5
guy(noun, man, fellow, male)
5
pal(noun, man, fellow, guy)
5
son(noun, family, kinship, lineage)
5
guest(noun, person, individual, stranger)
5
outlander(noun, person, individual, guest, stranger)
5
strange(adjective, characteristic, person, trait, relation)
4
man(noun, fellow, guy, male)
4
boy(noun, person, man, male)
4
grandson(noun, family, kinship, lineage)
4
buddy(noun, bond, family, relative, kinship)
4
bro(noun, bond, family, relative, kinship)
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APASmart Define. (2016). sister thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/sister/thesaurus/antonyms
ChicagoSmart Define. 2016. "sister thesaurus" https://smartdefine.org/sister/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2016, sister thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/sister/thesaurus/antonyms>.
MLASmart Define. "sister thesaurus" 30 March 2016. Web. 24 September 2026. <https://smartdefine.org/sister/thesaurus/antonyms>