This document discusses metaphor and metonymy. It defines metaphor as a figure of speech that makes an implied comparison between two unlike things that have something in common. Metonymy replaces a word with something closely associated with it. Examples of metaphors include "he is a lion in battle" and "my gym is a prison." Examples of metonymy include "the suits were at a meeting" and "Dallas won yesterday's game." The key difference between metaphor and metonymy is that metaphor uses substitution based on similarity, while metonymy uses association based on contiguity.