| essential | |
| evade | |
| evasively | |
| everyday | |
| execute | |
| exhibit | |
| extra(adjective, poor, inferior) | |
| extreme | |
| fail(verb, yield) | |
| failure | |
| faithlessly | |
| fall behind(verb, expression, phrasal verb, fail, yield) | |
| falsely | |
| fictitiously | |
| filthy | |
| flop | |
| follow | |
| following | |
| forfeit(verb, fail, yield) | |
| foxily |
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| APA | Smart Define. (2016). best thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/best/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "best thesaurus" https://smartdefine.org/best/thesaurus/antonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, best thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/best/thesaurus/antonyms>. |
| MLA | Smart Define. "best thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/best/thesaurus/antonyms> |