| married woman(noun, expression, partner, spouse) | |
| monogamist(noun, partner, spouse) | |
| other half(noun, expression, companion, partner, spouse) | |
| other man | |
| other woman | |
| pal(noun, companion, spouse, wife, husband) | |
| participant(noun, companion, spouse, wife, husband) | |
| partner(noun, companion, mate, consort, spouse) | |
| playmate(noun, companion, spouse, wife, husband) | |
| precious(noun, darling, honey, sugar, dearest) | |
| roommate(noun, partner, spouse, wife) | |
| sweet one | |
| teammate(noun, companion, spouse, wife, husband) | |
| woman friend | |
| courtesan(noun, concubine, paramour, mistress) |
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| APA | Smart Define. (2015). significant other thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/significant_other/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "significant other thesaurus" https://smartdefine.org/significant_other/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, significant other thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/significant_other/thesaurus/synonyms>. |
| MLA | Smart Define. "significant other thesaurus" 24 December 2015. Web. 26 September 2026. <https://smartdefine.org/significant_other/thesaurus/synonyms> |