52 entries under ineffectual topic. ×

2
unreal(adjective, wrong, fake, false, counterfeit)
2
worthless(adjective, useless, unsound, unfit, trifling)
1
deficient(adjective, poor, false, inadequate, insufficient)
1
green(adjective, mean, bad, weak, poor)
1
hollow(adjective, fake, poor, false, counterfeit)
1
incomplete(adjective, poor, false, inadequate, insufficient)
1
unsanctioned(adjective, wrong, void, unsound, meaningless)
0
flabby(adjective, weak, poor, inadequate, unhealthy)
0
immature(adjective, poor, inadequate, ineffective)
0
improbable(adjective, poor, inadequate, ineffective)
0
inconceivable(adjective, poor, inadequate, ineffective)
0
incredible(adjective, poor, inadequate, ineffective)
0
inept(adjective, poor, inadequate, ineffective)
0
lacking(adjective, poor, inadequate, ineffective)
0
limited(adjective, poor, inadequate, ineffective)
0
pathetic(adjective, poor, inadequate, ineffective)
0
raw(adjective, poor, inadequate, ineffective)
0
shallow(adjective, poor, inadequate, ineffective)
0
slight(adjective, poor, inadequate, ineffective)
0
slim(adjective, poor, inadequate, ineffective)
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APASmart Define. (2016). invalid thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/invalid/thesaurus/synonyms
ChicagoSmart Define. 2016. "invalid thesaurus" https://smartdefine.org/invalid/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, invalid thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/invalid/thesaurus/synonyms>.
MLASmart Define. "invalid thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/invalid/thesaurus/synonyms>