soundness Synonyms

firmness solidity strength wisdom wiseness healthiness justifiability truth trustiness toughness substantialness substantiality physical fitness sturdiness reason steadiness stableness stability solvency solidness senses validity vigor well-being haleness dependability wholesomeness meritoriousness mental balance marbles lump sum good sense persuasiveness believability normality roadworthiness salubriousness wholeness sensibleness sense security invincibility integrity immovability healthfulness health hardness force fitness admissibility