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.
duello duelli dull duel dell dully delly dually del deli dual dele diel deil doll deal duly dill tell dilly telly dally delay doula dulia dolly teloi tulle tallow tuille tallowy dal dol tel
jello duello niello cello hello ell hell telly hullo helio mell hilloa wallow fillo helo fellow fella tallow nielli knell welly hulloa holloa halloa yell shell willow well teloi tell selle hollow sallow celli cell paella jell callow phyllo below halloo bell hillo holloo felly hulloo duelli sell jelly mallow lilo follow fell quell felloe kelly allow hallo delly alloy bellow mellow nelly hollo fallow pillow cella hallow dell belle belly billow shallow shelly yellow