Synonyms|165Antonyms|58|Broader|3Narrower|3Related|220
2
insufficiency(noun, weakness, skill, failure, lack)
2
vanity(uselessness, unsuccessfulness)
1
abortion
1
absurdity
1
blemish(defect, deficiency, imperfection, limitation, inadequacy)
1
dearth(defect, deficiency, imperfection, inadequacy, shortage)
1
defalcation(defect, deficiency, imperfection, inadequacy, shortage)
1
defect(noun, deficiency, imperfection, limitation, inadequacy)
1
defectiveness(defect, imperfection, inadequacy, shortage, inability)
1
deficit(defect, deficiency, imperfection, inadequacy, shortage)
1
disability
1
disqualification(noun, weakness, skill, failure, shortcoming)
1
disservice
1
drawback(defect, deficiency, imperfection, inadequacy, shortage)
1
emptiness
1
failing(defect, deficiency, imperfection, limitation, inadequacy)
1
fatuity
1
faultiness(defect, deficiency, imperfection, inadequacy, shortage)
1
frailty(noun, weakness, skill, failure, shortcoming)
1
fruitlessness
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APASmart Define. (2015). inefficacy thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/inefficacy/thesaurus/synonyms
ChicagoSmart Define. 2015. "inefficacy thesaurus" https://smartdefine.org/inefficacy/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, inefficacy thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/inefficacy/thesaurus/synonyms>.
MLASmart Define. "inefficacy thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/inefficacy/thesaurus/synonyms>