307 entries under adjective topic. ×
| illegitimate | |
| improper(wrong, fake, counterfeit, dishonest) | |
| inaccurate(wrong, fake, false, counterfeit) | |
| impaired(mean, weak, sick, feeble) | |
| inconclusive(poor, false, unreasonable, inadequate) | |
| incongruous(ill, unhealthy, absurd, irrational) | |
| senseless(wrong, false, foolish, stupid) | |
| specious(correct, wrong, fake, false) | |
| valetudinarian(noun, disease) | |
| contradictory(absurd, irrational, arbitrary, perverse) | |
| defunct(functioning, extinct) | |
| imperfect(mean, weak, down, ill) | |
| impotent(weak, poor, inadequate, feeble) | |
| incompetent(poor, inadequate, useless, unfit) | |
| ineffectual(poor, inadequate, unsound, trifling) | |
| inexact(wrong, fake, false, counterfeit) | |
| inferior | |
| poorly(adverb, mean, weak, sick) | |
| reasonless(foolish, unreasonable, irrational, worthless) | |
| run-down(sick, unhealthy, unfit, infirm) |
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| APA | Smart Define. (2016). invalid thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/invalid/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "invalid thesaurus" https://smartdefine.org/invalid/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, invalid thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/invalid/thesaurus/synonyms>. |
| MLA | Smart Define. "invalid thesaurus" 29 March 2016. Web. 22 September 2026. <https://smartdefine.org/invalid/thesaurus/synonyms> |