Synonyms|215Antonyms|56|Broader|0Narrower|0Related|93

72 entries under adjective topic. ×

2
innocuous(inferior, inadequate, limited, feeble)
2
limited(inferior, inadequate, feeble, useless)
2
unfortunate
2
unrewarding
2
void(inferior, inadequate, useless, trivial)
1
anticlimactic(inferior, inadequate, limited, feeble)
1
defeasible(inferior, inadequate, limited, feeble)
1
foiled
1
for nothing
1
frustrated
1
in vain
1
insufficient
1
inutile
1
neutralized(inferior, inadequate, limited, feeble)
1
no avail
1
no purpose
1
non-beneficial(ability, proficiency, efficiency, effectiveness)
1
null and void(expression, idiom, ineffectual, impotence)
1
purposeless
1
spineless(inferior, inadequate, limited, feeble)
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APASmart Define. (2016). inefficacious thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/inefficacious/thesaurus/synonyms
ChicagoSmart Define. 2016. "inefficacious thesaurus" https://smartdefine.org/inefficacious/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, inefficacious thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/inefficacious/thesaurus/synonyms>.
MLASmart Define. "inefficacious thesaurus" 24 March 2016. Web. 26 September 2026. <https://smartdefine.org/inefficacious/thesaurus/synonyms>