6
small(noun, adjective, weak, weakness, ill)
6
smooth(adjective, feature, dull, hard, weak)
6
thin(adjective, weak, weakness, ill, faint)
6
unsound(adjective, weak, sound, weakness, well)
5
failing(noun, adjective, weak, weakness, which)
5
flat(verb, adjective, feature, weak, weakness)
5
ill(noun, adjective, adverb, feature, weak)
5
indistinct(adjective, weak, weakness, failing, faint)
5
insecure(adjective, weakness, steady, failing, infirmity)
5
insipid(adjective, weak, weakness, failing, infirmity)
5
invalid(noun, verb, adjective, action, weak)
5
lame(adjective, weak, weakness, healthy, ill)
5
mellow(verb, adjective, action, rough, weakness)
5
regular(noun, adjective, weak, weakness, failing)
5
shaky(adjective, weak, sound, weakness, failing)
5
stale(noun, verb, adjective, action, weak)
5
unstable(adjective, clear, sound, weakness, steady)
5
unsteady(adjective, weak, weakness, failing, infirmity)
5
unsubstantial(adjective, weak, weakness, failing, infirmity)
5
wasted(adjective, weak, weakness, failing, infirmity)
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APASmart Define. (2016). strong thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/strong/thesaurus/antonyms
ChicagoSmart Define. 2016. "strong thesaurus" https://smartdefine.org/strong/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2016, strong thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/strong/thesaurus/antonyms>.
MLASmart Define. "strong thesaurus" 1 April 2016. Web. 24 September 2026. <https://smartdefine.org/strong/thesaurus/antonyms>