Synonyms|3.3kAntonyms|621|Broader|72Narrower|451Related|3.9k
3
quiet
3
clairvoyant
3
harebrained
3
ill(adjective, sick)
3
incoherent
3
insecure(adjective, strong, steady, dangerous, precarious)
3
invalid(adjective, worthless, unfounded)
3
loony
3
rickety(adjective, unsound)
3
shaky
3
silent
3
unbalanced
3
unstable(clear, steady)
3
unsustainable
3
weak
2
absurd
2
decrepit
2
disabled
2
frail
2
senseless
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APASmart Define. (2016). sound thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/sound/thesaurus/antonyms
ChicagoSmart Define. 2016. "sound thesaurus" https://smartdefine.org/sound/thesaurus/antonyms (accessed September 26, 2026).
HarvardSmart Define 2016, sound thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/sound/thesaurus/antonyms>.
MLASmart Define. "sound thesaurus" 24 March 2016. Web. 26 September 2026. <https://smartdefine.org/sound/thesaurus/antonyms>