Synonyms|1.1kAntonyms|423|Broader|11Narrower|16Related|2.8k
10
sound(adjective, strong, complete, reasonable, healthy)
8
strong(adjective, sound, well)
7
pink
6
safe(adjective, strong, sound, well)
6
sane(adjective, strong, sound, reasonable, stupid)
6
stable(adjective, strong, weak, sound, soft)
6
well(adjective, adverb, strong, sound)
5
accurate(adjective, strong, sound, well)
5
good
5
precise
5
reliable(adjective, strong, sound, well)
5
salubrious
5
secure(verb, adjective, strong, weak, sound)
5
valid(adjective, strong, sound, right, false)
4
logical(adjective, obscure, illogical)
4
rational(adjective, strong, sound, careless, stupid)
4
right(adjective, strong, sound, well)
4
sure(adjective, strong, sound, well)
3
hearty
3
balanced(adjective, strong, sound, well)
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APASmart Define. (2015). unsound thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unsound/thesaurus/antonyms
ChicagoSmart Define. 2015. "unsound thesaurus" https://smartdefine.org/unsound/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2015, unsound thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unsound/thesaurus/antonyms>.
MLASmart Define. "unsound thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/unsound/thesaurus/antonyms>