Analogy , Metaphor and Similes

Analogy
Analogy is both the cognitive process of transferring information from a particular subject (the analogue or source) to another particular subject (the target), and a linguistic expression corresponding to such a process. In a narrower sense, analogy is an inference or an argument from one particular to another particular, as opposed to deduction, induction and abduction, where at least one of the premises or the conclusion is general. The word analogy can also refer to the relation between the source and the target themselves, which is often, though not necessarily, a similarity, as in the biological nation of analogy.

Metaphor
Metaphor is a rhetorical trope that describes a first subject as being or equal to a second object in some way. Thus, the first subject can be economically described because implicit and explicit attributes from the second subject are used to enhance the description of the first. This device is known for usage in literature, especially in poetry, where with few words, emotions and associations from one context are associated with objects and entities in a different context. In a simpler definition, it is comparing two things without using the words "like" or "as."

Similes
A simile is a technique that uses words such as "like" or "as" to compare two ideas. 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 seek to equate two ideas despite their differences. 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."