(n.) An expression that relates two unlike things (using like or as); as, she is like a flower\; a similitude; a poetical or imaginative comparison.

accordance affinity agreement alikeness allegory alliance alliteration allusion anacoluthon anadiplosis analogy anaphora anastrophe antiphrasis antithesis antonomasia aping apophasis aporia aposiopesis apostrophe approach approximation assimilation balancing catachresis chiasmus circumlocution climax closeness community comparability comparative anatomy comparative degree comparative grammar comparative judgment comparative linguistics comparative literature comparative method compare comparing comparison conformity confrontation confrontment contrast contrastiveness conversion copying correlation correspondence distinction distinctiveness ecphonesis emphasis exclamation gemination hypallage hyperbaton hyperbole identity imitation inversion irony likeness likening litotes malapropism matching meiosis metaphor metonymy mimicking nearness onomatopoeia opposing opposition oxymoron parallelism paregmenon parenthesis parity periphrasis personification pleonasm preterition prolepsis proportion regression relation repetition resemblance sameness sarcasm semblance similarity similitude simulation spoonerism syllepsis symploce synecdoche trope of comparison weighing zeugma