| apart(adjective, individual, single, solitary, singular) | |
| first and last(noun, expression, idiom, love, prize) | |
| one shot(expression, adjective, individual, single, solitary) | |
| single(adjective, separate, exceptional, special, individual) | |
| solitary(adjective, separate, exceptional, special, individual) | |
| absolute | |
| atom | |
| azygous | |
| baby(noun, love, prize, steady, friend) | |
| beau(noun, love, prize, steady, companion) | |
| boyfriend(noun, love, prize, steady, companion) | |
| by oneself(expression, adjective, adverb, individual, single) | |
| celebrated | |
| celibate | |
| exclusive(adjective, exceptional, individual, rare, single) | |
| fabled | |
| fair-haired boy(noun, expression, love, friend, dear) | |
| favorite person(noun, expression, love, friend, dear) | |
| fiancé(noun, love, prize, steady, magnification) | |
| girl |
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| APA | Smart Define. (2016). one and only thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/one_and_only/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "one and only thesaurus" https://smartdefine.org/one_and_only/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, one and only thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/one_and_only/thesaurus/synonyms>. |
| MLA | Smart Define. "one and only thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/one_and_only/thesaurus/synonyms> |