Wrymouth is a term used to describe a person with a distorted or twisted mouth. However, this term is quite uncommon and may not be familiar to everyone. There are several synonyms that can be used to describe this particular facial feature such as lopsided smile, crooked mouth, twisted lips, contorted mouth, or distorted grin. Each of these synonyms conveys a similar meaning to wrymouth and can be used interchangeably depending on the context. It's important to note that these words should be used with sensitivity as they refer to a physical characteristic that a person may feel self-conscious about.