sturdiness Synonyms

strengths stamina stalwartness stableness stability soundness solidity security robustness resilience power potentness steadfastness steadiness stoutness stockiness ruggedness heftiness guts vigour vitality vigor toughness thew substantiality strength potency ponderability firmness fastness energy endurance durability determination constancy cohesion burliness brawniness brawn force fortitude hardiness persistence permanence muscularity muscle mightiness might lustiness integrity