WIKI:
A
simile is a figure of speech comparing two unlike things, often introduced with the word "like" or "as".
[1] Even though similes and
metaphors are both forms of comparison, similes allow the two ideas to remain distinct in spite of their similarities, whereas metaphors compare two things without using "like" or "as". For instance, a simile that compares a person with a bullet would go as follows: "John was a record-setting runner and as fast as a speeding bullet." A metaphor might read something like, "John was a record-setting runner. That speeding bullet could zip past you without you even knowing he was there."