paronomasia

noun2

1. •
   (rhetoric) A pun or play on words.

   • Oh, by the way, any attempt to present me with any kind of testimonial will result in stern measures. And when I say stern measures, I am indulging in a paronomasia, or play on words! Good night. — 1936
2. •
   (rhetoric) The use of puns.

   • Paronomasia to the sense alludes, When words but little varied it includes. — 1835