Metonymies are figures of speech that use substitute words or phrases in place of the original terms. There are several synonyms for the word metonymies, including synecdoche and metalepsis. A synecdoche is a type of metonymy that uses a part of something to refer to the whole, such as "all hands on deck" to refer to all crew members. Metalepsis, on the other hand, is a figure of speech in which a word or phrase is used in a different context to create a new meaning, such as "I'll have to ask the higher-ups" to refer to upper-level management. Other synonyms for metonymies include transferred epithet, metaphor, and allegory, each with their own unique characteristics and uses in language.