Is crack an example of onomatopoeia?
Yes, crack is an Onomatopoeia. This is because an Onomatopoeia is when a word sounds like what it represents. In other words, you say it exactly how it is when you hear it.
well, the truth is... you really don't have to look at a poem with onomatopoeia, you can find them in a comic such as: BANG, POW, SLAM, and BUZZ. but just for the purpose of your question you can find it in http://www.funny-poems-for-free.com/onomatopoeia-poems.html and there is one called "crack an egg" by Denise Rogers. i know it's probably not a famous poem, but it is an example of a poem with a form of onomatopoeia…
No. Onomatopoeia is the adjective used to describe a word that is a sound. For example: Oink is an onomatopoeia, and so is moo. So the actual word "onomatopoeia" is not a verb, but the words that it describes can be. Onomatopoeia could also be a noun. "The cow made a strange onomatopoeia."="The cow made a strange noise"