64 entries under feeble topic. ×

5
unskilled(adjective, weak, inadequate, incompetent)
5
unsuitable(adjective, weak, inadequate, useless)
4
faulty(adjective, weak, poor, inadequate)
4
flabby(adjective, weak, poor, inadequate)
4
forceless(adjective, weak, inferior, inadequate)
4
inexpert(adjective, weak, inadequate, incompetent)
4
irresolute(adjective, weak, soft, mediocre)
4
poor(adjective, dull, light, weak, soft)
4
shiftless(adjective, weak, careless)
4
wishy-washy(adjective, dull, light, weak, soft)
3
dull(adjective, light, weak, soft, poor)
3
indecisive(adjective, weak, useless, incompetent)
3
mediocre(adjective, weak, poor, base, inferior)
3
thin(adjective, dull, light, weak, soft)
3
unconvincing(adjective, weak, poor, inadequate)
2
cowardly(adjective, weak, soft, mediocre)
2
irresponsible(adjective, weak, careless)
2
limited(adjective, poor, inferior, inadequate)
2
unpersuasive
2
unsatisfactory(adjective, weak, poor, inadequate)
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APASmart Define. (2016). ineffective thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/ineffective/thesaurus/synonyms
ChicagoSmart Define. 2016. "ineffective thesaurus" https://smartdefine.org/ineffective/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, ineffective thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/ineffective/thesaurus/synonyms>.
MLASmart Define. "ineffective thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/ineffective/thesaurus/synonyms>