10 entries under expression topic. ×
| boon companion(companion, friend, mate, comrade) | |
| bosom buddy(companion, friend, mate, comrade) | |
| big sister | |
| bro's female counterpart | |
| female sibling | |
| half sister | |
| informal family member | |
| little sister | |
| safety injection system | |
| secret intelligence service |
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| APA | Smart Define. (2015). sis thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/sis/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "sis thesaurus" https://smartdefine.org/sis/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, sis thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/sis/thesaurus/synonyms>. |
| MLA | Smart Define. "sis thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/sis/thesaurus/synonyms> |