The word onepiece is commonly associated with a one-piece garment, such as a jumpsuit or romper. However, there are several synonyms for this word that can be used to describe similar types of clothing. Some examples include bodysuit, onesie, unitard, catsuit, and leotard. Depending on the context, one of these synonyms may be preferred over another. For instance, a bodysuit typically refers to a form-fitting garment that covers the torso and often has a snap closure at the crotch, while a onesie usually refers to a baby's outfit that covers the whole body. Overall, using synonyms for onepiece can add variety and precision to one's language.