Synonyms|1.1kAntonyms|339|Broader|13Narrower|39Related|1k
1
fictitious
1
helpless
1
hypothetical
1
idle(adjective, worthless, ineffective)
1
illusory
1
immaterial
1
in vain
1
inactive
1
inconclusive
1
inconstant
1
inexpedient
1
inexpert
1
inoperable
1
invented
1
non-beneficial(adjective, effect, result, outcome)
1
nonexistent
1
nonfunctional
1
nugatory
1
over smart
1
pointless
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ChicagoSmart Define. 2015. "effective thesaurus" https://smartdefine.org/effective/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2015, effective thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/effective/thesaurus/antonyms>.
MLASmart Define. "effective thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/effective/thesaurus/antonyms>