paronomasia

noun Rhetoric.

1. the use of a word in different senses or the use of words similar in sound to achieve a specific effect, as humor or a dual meaning; punning.
2. a pun.

noun

1. rhetoric a play on words, esp a pun

n.“pun,” 1570s, from Latin, from Greek paronomasia “play upon words which sound similarly,” from paronomazein “to alter slightly, to call with slight change of name,” literally “to name beside,” from par- (see para- (1)) + onomasia “naming,” from onoma “name” (see name (n.)).