Figures of speech are words or phrases that depart from literal language to provide comparison, emphasis, clarity or freshness. Some common figures of speech include similes, which compare two unlike things in a way using words like "like" or "as"; metaphors, which directly identify one thing with another; and personification, which gives human traits to non-human things. Other figures include irony, hyperbole, metonymy, apostrophe, assonance, alliteration, onomatopoeia, and allusion.