163 entries under inadequate topic. ×

12
barren(adjective, weak, poor, base, inferior)
12
inept(adjective, weak, poor, stupid, idle)
12
spineless(adjective, weak, soft, poor, uncertain)
11
incapable(adjective, strong, weak, ability)
11
inoperative(adjective, weak, stupid, idle)
10
feckless(adjective, stupid, idle, feeble)
9
nugatory(adjective, poor, failure, base, inferior)
9
insufficient(adjective, weak, thin, delicate, failure)
8
paltry(adjective, weak, poor, thin, delicate)
8
unprofitable(adjective, poor, base, silly, stupid)
7
forceless(adjective, weak, limited, feeble)
7
unfruitful(adjective, weak, limited, feeble)
7
unqualified(adjective, poor, useless, incompetent)
6
unfit(adjective, weak, skill, inept)
5
helpless(adjective, strong, weak, ability, thin)
5
lame(adjective, weak, poor, thin, delicate)
5
void(adjective, limited, feeble, useless)
4
flabby(adjective, weak, poor, thin, delicate)
4
inexpert(adjective, useless, incompetent, inept)
4
invalid(adjective, poor, unsound, trifling)
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APASmart Define. (2016). ineffectual thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/ineffectual/thesaurus/synonyms
ChicagoSmart Define. 2016. "ineffectual thesaurus" https://smartdefine.org/ineffectual/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, ineffectual thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/ineffectual/thesaurus/synonyms>.
MLASmart Define. "ineffectual thesaurus" 24 March 2016. Web. 28 September 2026. <https://smartdefine.org/ineffectual/thesaurus/synonyms>