18
inept(adjective, incompetent, insufficient, clumsy, unskilled)
11
feeble(adjective, strong, fit)
9
incapable(adjective, strong, fit, adequate, insufficient)
9
incompetent(adjective, strong, qualified, insufficient, inept)
6
inadequate(adjective, incompetent, insufficient, inept, defective)
6
unable(adjective, strong, fit, skill, insufficient)
6
unqualified(adjective, suitable, incompetent, insufficient, prepared)
5
not good
5
unskilled(adjective, insufficient, inept)
5
useless
4
inapt(adjective, happy, suitable, incompetent)
3
inefficient(adjective, sound, well, insufficient, inept)
3
feckless(adjective, strong, purpose)
3
green
3
bad
3
ineffective(adjective, strong, fit, successful)
3
unsuitable(adjective, insufficient, inept)
3
worthless
2
amateur
2
helpless(adjective, incompetent, vulnerable, incapable)
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APASmart Define. (2015). competent thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/competent/thesaurus/antonyms
ChicagoSmart Define. 2015. "competent thesaurus" https://smartdefine.org/competent/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2015, competent thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/competent/thesaurus/antonyms>.
MLASmart Define. "competent thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/competent/thesaurus/antonyms>