What is the difference between synecdoche and metaphor?

Synecdoche and metaphor are both figures of speech, but they are different.

Synecdoche uses a part of something to represent the whole (or vice versa) (e.g., “wheels” to refer to a car). A metaphor compares two seemingly unrelated things by saying one is the other (e.g., “life is a highway”).

Scribbr’s free Paraphrasing Tool can help you come up with synonyms to help you use synecdoche in your writing.