A false smile is a type of smile that is not genuine or sincere, but rather forced or fake. There are many synonyms for the term "false smile" that can be used to describe this type of expression. Some examples include a phony smile, a fake grin, a plastic smile, a feigned smile, a forced smile, or a insincere smile. These terms all describe a smile that is not a true reflection of the person's emotions or feelings. Whether used in literature or in everyday conversation, synonyms for false smiles can add clarity and depth to the meaning of a message or situation.