I know hundreds of people who have spent years and thousands of dollars on tests looking for ulcers or spastic bowels. I tell them to lay off all dairy products for two weeks. The results are usually so striking that it changes their lives.
—David Jacobs
onomatopoeia
A figure of speech in which words are used to imitate sounds. Examples of onomatopoeic words are buzz, hiss, zing, clippety-clop, and tick-tock. Keats's "Ode to a Nightingale" not only uses onomatopoeia, but calls our attention to it: