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.
shell shelly sheol shill sheal shall shiel sheila shul shallow shyly shily chiel shool shoal chela shaly shaul shale shawl chill cholla shaley shoaly challa chelae chilly chally chilli challah challie sial
hell shell ell ghyll hall knell cella hello helo hill jell heal jelly quell heil shill nielli cello selle delly duello telly welly wheel chiel shall paella sheol cell nelly heel sheal niello fell belly belle bell hull felly jello kelly celli fella mell sell dell duelli tell well wheal chela chill shelly shiel yell
she shea sheugh shew shoe sheesh sheuch