Synonyms|633Antonyms|195|Broader|12Narrower|11Related|609
0
failing
0
fallacy
0
fallibility
0
fatuity
0
fitfulness
0
fixed idea(expression, dislike)
0
flexibility
0
flightiness
0
fluctuation
0
foible
0
fragility
0
frenzy
0
giddiness
0
growth
0
hangup
0
hesitancy
0
idiocy
0
imbecility
0
impermanence
0
impermanency
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APASmart Define. (2015). soundness thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/soundness/thesaurus/antonyms
ChicagoSmart Define. 2015. "soundness thesaurus" https://smartdefine.org/soundness/thesaurus/antonyms (accessed September 28, 2026).
HarvardSmart Define 2015, soundness thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/soundness/thesaurus/antonyms>.
MLASmart Define. "soundness thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/soundness/thesaurus/antonyms>