Wordplay is almost anything that involves language and humor. Or at least clever or interesting if not necessarily humorous. Here’s a link to a site that has a long list of different kinds of wordplay. It’s called Scorpio Tales, which is a pun on scorpion tails. Wordplay includes puns (of course) but also palindromes, anagrams, and—well, take a look at the list. Be sure to check out the Tom Swifties near the bottom.