Investigations of English words and phrases have led scholars to the discovery of several rhyming phenomena as in such words as CRISSCROSS, POWWOW and BONBON. These types of rhyming were noted by Jespersen in his Modern English Grammar as well as Marchand in Categories and Types of Present-Day English Word-Formation. The words fall in three groupings. consonantal rhymes, vowel rhymes, and repetition of the same syllable (or tautonyms). It is a real challenge to see how many of each you can discover.
Tiedt, Iris M.
"Rhyming Phenomena in English Words,"
Word Ways: Vol. 6
, Article 3.
Available at: http://digitalcommons.butler.edu/wordways/vol6/iss1/3