The term "overlip" may not be commonly used in everyday vocabulary, but it refers to the upper lip protruding above the lower lip. There are several synonyms for this term, including "supercilium," "jutted-out lip," "protruding top lip," "upper lip prominence," and "thick upper lip." Each of these synonyms conveys the same meaning as "overlip" and can be used interchangeably in speech or writing. While these terms may not be as straightforward as "upper lip," they offer a more descriptive and precise way of referring to this facial feature.