39 entries under adjective topic. ×
| unofficial(informal, improper, incorrect, unauthorized) | |
| unauthorized(permitted, sanctioned) | |
| unlawful | |
| illegal | |
| informal(simple, casual) | |
| unsanctioned | |
| confidential | |
| auricular | |
| civil | |
| clandestine | |
| coy | |
| domestic | |
| dormant | |
| esoteric | |
| exclusive | |
| extrajudicial | |
| furtive | |
| individual | |
| inner | |
| intimate |
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| APA | Smart Define. (2015). official thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/official/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "official thesaurus" https://smartdefine.org/official/thesaurus/antonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, official thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/official/thesaurus/antonyms>. |
| MLA | Smart Define. "official thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/official/thesaurus/antonyms> |