Synonyms|428Antonyms|78|Broader|9Narrower|13Related|102
0
inadequateness
0
inaptitude
0
incapableness
0
incapacity
0
incompetency
0
inconvenience
0
ineptitude
0
ineptness
0
injury
0
insolubility
0
insufficiency
0
lack of ability(expression, idiom)
0
lack of skill(expression, idiom)
0
languor
0
maladroitness
0
marsh
0
marshland
0
peccadillo
0
people
0
persuade
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APASmart Define. (2015). efficacy thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/efficacy/thesaurus/antonyms
ChicagoSmart Define. 2015. "efficacy thesaurus" https://smartdefine.org/efficacy/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2015, efficacy thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/efficacy/thesaurus/antonyms>.
MLASmart Define. "efficacy thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/efficacy/thesaurus/antonyms>