2
rectitude(noun, honor, right, confidence, goodness)
2
resolve
2
robust health(expression, idiom, health)
2
rude health(expression, idiom, health)
2
sensibleness(noun, understanding, knowledge, mind, reason)
2
sober senses(expression, idiom, sanity)
2
soberness(lucidness, clear-headedness)
2
solvency(noun, health, healthiness, wholeness, creditworthiness)
2
sound sense(expression, knowledge, reason, sense, intelligence)
2
staunchness(noun, reliability)
2
steadfastness(noun, support, control, strength, balance)
2
stoutness(noun, health, force, body, power)
2
substance(noun, health, force, body, power)
2
sweet reason(expression, knowledge, reason, sense, intelligence)
2
trustworthiness(noun, honor, right, color, chance)
2
uniformity(routine, regularity)
2
verdure(noun, health, force, body, power)
2
virtue(noun, honor, right, confidence, goodness)
1
ability(noun, activity, action, go, drive)
1
acumen(noun, understanding, knowledge, mind, reason)
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APASmart Define. (2015). soundness thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/soundness/thesaurus/synonyms
ChicagoSmart Define. 2015. "soundness thesaurus" https://smartdefine.org/soundness/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, soundness thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/soundness/thesaurus/synonyms>.
MLASmart Define. "soundness thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/soundness/thesaurus/synonyms>