Synonyms|633Antonyms|195|Broader|12Narrower|11Related|609
2
frailness
2
frailty
2
indisposition
2
shakiness
2
unhealthiness(noun, strength, unsoundness)
2
unreliability(noun, calm)
2
weakness(enough, robustness)
1
agility
1
decrepitude
1
defect
1
derangement
1
faintness
1
fault(noun, right, care, advantage, defect)
1
fickleness
1
flimsiness
1
folly
1
foolishness
1
hollowness
1
inconstancy(advantage, enough)
1
insecurity
For more, visit Soundness on Power Thesaurus
11 years ago|1.5k views|share |citing 
APASmart Define. (2015). soundness thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/soundness/thesaurus/antonyms
ChicagoSmart Define. 2015. "soundness thesaurus" https://smartdefine.org/soundness/thesaurus/antonyms (accessed September 26, 2026).
HarvardSmart Define 2015, soundness thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/soundness/thesaurus/antonyms>.
MLASmart Define. "soundness thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/soundness/thesaurus/antonyms>