The Greek figures, or rhetorical devices, used is antistrophe/epistrophe/epiphora, as in the repetition of the last word (feet) in successive clauses, or thoughts; epizeuxis for the repetition of a word several times in a row with nothing in between; palilogia for the multiple instances of feet in the same breath or paragraph; and the gratuitious rhyme for the feet-meet.
Are there more of these? You’ll have to buy the book to see. You can find them in The Foot Book: Dr. Seuss’s Wacky Book of Opposites(Amazon affiliate link)
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