| acquiescent | |
| adjustable | |
| airy | |
| baggy(adjective, drooping) | |
| bendable | |
| capricious | |
| changeful | |
| characterless | |
| conceptual | |
| contestable | |
| deep | |
| delicate(strong, hard, harsh) | |
| disloyal(adjective, weak, obscure, uncertain) | |
| false(adjective, weak, obscure, uncertain) | |
| faltering | |
| female | |
| fickle(adjective, weak, obscure, uncertain) | |
| fluctuating | |
| fluffy | |
| forceless |
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| APA | Smart Define. (2016). firm thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/firm/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "firm thesaurus" https://smartdefine.org/firm/thesaurus/antonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, firm thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/firm/thesaurus/antonyms>. |
| MLA | Smart Define. "firm thesaurus" 31 March 2016. Web. 24 September 2026. <https://smartdefine.org/firm/thesaurus/antonyms> |