Synonyms|633Antonyms|195|Broader|12Narrower|11Related|609

28 entries under noun topic. ×

22
insanity(illness, balance, foolishness)
7
unsoundness
6
sickness
4
disease
4
instability(stability, imbalance, inconstancy)
3
aberration(state, normality)
3
infirmity(health, weakness, sickness, perfection)
3
malady
2
condition
2
unhealthiness(strength, unsoundness)
2
unreliability
1
defect
1
derangement
1
fault(right, care, advantage, defect)
1
flimsiness
1
hollowness
1
porosity
0
decay
0
discomfort
0
discontinuity
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APASmart Define. (2015). soundness thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/soundness/thesaurus/antonyms
ChicagoSmart Define. 2015. "soundness thesaurus" https://smartdefine.org/soundness/thesaurus/antonyms (accessed September 30, 2026).
HarvardSmart Define 2015, soundness thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/soundness/thesaurus/antonyms>.
MLASmart Define. "soundness thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/soundness/thesaurus/antonyms>