I am not interested to know whether vivisection produces results that are profitable to the human race...The pain which it inflicts upon unconsenting animals is the basis of my enmity toward it, and it is to me sufficient justification without looking further.
—Mark Twain
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: