A frozen metaphor is a literary device that relies on a once-vibrant metaphor that has lost its original meaning due to overuse, becoming cliche. Synonyms for this term include stale metaphor, dead metaphor, and cliche metaphor. A stale metaphor refers to a wording that lacks originality or freshness. A dead metaphor is a figure of speech that was once meaningful but has lost its relevance. A cliche metaphor is an overused expression that no longer holds power or meaning. All of these synonyms highlight the lack of freshness and originality in a frozen metaphor, emphasizing the importance of using creative figurative language in writing and speech.