simile -
a figure of speech that expresses a resemblance between things of different kinds (usually formed with `like' or `as')
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Wikipedia
A simile is a figure of speech that indirectly compares two different things by employing the words "like", "as", or "than". Even though similes and metaphors are both forms of comparison, similes indirectly compare the two ideas and allow them to remain distinct in spite of their similarities, whereas metaphors compare two things directly. For instance, a simile that compares a person with a bullet would go as follows: "Chris was a record-setting runner and as fast as a speeding bullet.