Stockiness refers to the physical characteristic of having a thick and muscular build. Synonyms for stockiness include robustness, sturdiness, huskiness, burliness, and burlyness. These words all describe a person or animal that is heavyset and strong. Other synonyms for stockiness include massiveness, bulkiness, and thickness, which refer to the size and solidity of the body. However, these words do not necessarily imply the muscularity that is a defining feature of true stockiness. Overall, using different synonyms for stockiness can help add variety and nuance to descriptions of physical build.