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.
dually dully dally dull dual duly dilly delly tally daily dolly duello dal duelli tallowy dial doll dell duel dahl dill tall deal dale doyly delay dulia doily dooly telly doula tulle dahlia doyley taille tallow tuille del dol
ally rally gally dually pally tally leally really dally sally bally chally wally all valley hall felly bully phalli foully galley lily delly calla gully allay cully mulley daily volley jelly dilly jolly hilly shelly shall chilly willy welly pulley wall dolly gilly dully challa maill vealy mall filly gall mealy sall fall golly lall paly coolly alley gaily holly hallo colly molly pall coaly tall call alloy sully rawly silly belly ball folly gayly kelly cullay bialy fully illy knolly gulley nelly telly billy walla waly wholly woolly lolly shaley shaly shoaly