I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
doyly doyley doily dooly dolly dol doll duly dole diol dally dully delly daily doula dilly dually doolie doolee del dal diel tolu tole dual toil deal deli dele duel deil dahl dale dell dial dull dill tola toll tool
coyly doyly holly folly feyly golly lowly moly holy wryly poly dolly doyley hooly dooly waylay woolly shoaly noily doily boyla gayly jowly coaly colly coly coolly cooly jolly lolly molly knolly oily roily hoyle wholly wooly shyly