64 entries under adjective topic. ×

17
feeble(strong, fit, slow, inadequate)
12
inept(slow, inadequate, expert, incompetent)
11
unable(strong, fit, slow, skill)
9
powerless(weak, slow, powerful, inadequate)
7
weak(firm, slow, powerful, healthy)
5
useless(slow, inadequate)
4
delicate(slow, inadequate)
4
incompetent(strong, qualified, unable, unskillful)
4
ineffective(strong, fit, slow, inadequate)
3
stupid(slow, inadequate)
3
incapable(strong, fit)
3
infirm(slow, inadequate)
3
unqualified
3
unskilled(slow, inadequate)
2
impotent(dull, strong, competent, unable)
2
helpless(incompetent, vulnerable, incapable)
2
inadequate(slow, incompetent, insufficient, defective)
2
inefficient(sound, well, competent, wasteful)
2
lame(weak, healthy, feeble, graceful)
2
poor(strong, noble, adequate)
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APASmart Define. (2016). able thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/able/thesaurus/antonyms
ChicagoSmart Define. 2016. "able thesaurus" https://smartdefine.org/able/thesaurus/antonyms (accessed September 21, 2026).
HarvardSmart Define 2016, able thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/able/thesaurus/antonyms>.
MLASmart Define. "able thesaurus" 14 March 2016. Web. 21 September 2026. <https://smartdefine.org/able/thesaurus/antonyms>