5
half sister(noun, expression, idiom)
3
half-sister
3
sister
2
aunt(noun, connection, relation, kin, relative)
2
brother
2
cousin
2
father
2
niece(noun, connection, relation, kin, relative)
2
son
2
uncle(noun, connection, relation, kin, relative)
1
agnate(noun, connection, relation, kin, relative)
1
blood
1
blood brother
1
brethren
1
brother-in-law(noun, connection, relation, kin, relative)
1
bub
1
bud
1
buddy
1
clansperson(noun, connection, relation, kin, relative)
1
cognate(noun, connection, relation, kin, relative)
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APASmart Define. (2015). stepsister thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/stepsister/thesaurus/synonyms
ChicagoSmart Define. 2015. "stepsister thesaurus" https://smartdefine.org/stepsister/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, stepsister thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/stepsister/thesaurus/synonyms>.
MLASmart Define. "stepsister thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/stepsister/thesaurus/synonyms>