soundness

1 the ability to withstand force or stress without being distorted, dislodged, or damaged the car manufacturer tested the soundness of the new model in various types of collisions Synonyms firmness, stability, strength, sturdinessRelated Words dependability, durability, reliability; solidity, solidness; cohesion, toughnessNear Antonyms insubstantiality, unsoundness, unsubstantiality; weaknessAntonyms insecurity, instability, precariousness, shakiness, unstableness, unsteadiness

2 the condition of being sound in body his athletic soundness is open to question since he's been away from the sport for so long Synonyms fitness, healthiness, heartiness, robustness, sap, health, verdure, wellness, wholeness, wholesomenessRelated Words fettle, shape; cleanliness, hygiene; hardiness, lustiness, robustiousness, ruggedness, stamina, strength, toughness, vigor, vigorousness, vitality; bloom, flush, flushness; activeness, agility, liveliness, spryness; weal, welfare, well-beingNear Antonyms debility, decrepitude, feebleness, frailness, infirmity, lameness, sickliness, weakness; ailment, condition, disease, disorder, malady, troubleAntonyms illness, sickness, unhealthiness, unsoundness