There are a variety of synonyms for the word "stylemark," each with their own unique connotations. One such synonym is "hallmark," which refers to a distinctive feature or trait that is indicative of a particular style or brand. Another option is "trademark," which is a symbol or design that is used to distinguish a particular brand or product. "Signature" is another synonym that refers to a unique identifying characteristic, often associated with an individual's personal style or creative output. Finally, "distinctive feature" and "fingerprint" are also synonyms that can be used to describe a specific characteristic or attribute that sets something apart from others.