1
flesh and blood(expression, idiom)
1
near relation(expression, idiom, consanguinity)
1
agnate
1
blood
1
brotherly(adjective, fraternal)
1
distant relation(expression, idiom, consanguinity)
1
folks
1
kindred(noun, connection, link, association, house)
1
kinsfolk
1
ancestry
1
association(noun, connection, link, relation, relationship)
1
avuncular
1
brother-in-law
1
clansman
1
clansperson
1
closely related
1
collateral
1
collateral relative
1
colleague(noun, associate)
1
congeneric
11 years ago|10k views|share |citing 
APASmart Define. (2015). sibling thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/sibling/thesaurus/synonyms
ChicagoSmart Define. 2015. "sibling thesaurus" https://smartdefine.org/sibling/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, sibling thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/sibling/thesaurus/synonyms>.
MLASmart Define. "sibling thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/sibling/thesaurus/synonyms>