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.
sheila sheal shell shiel shily sheol chela shill shelly chelae sial shul chola shoal shyly chiel shaly chill chile chili shool shawl shall shale shaul challa chilli chilly cholla shaley chalah shoaly challah shallow
sheila voila chelae telia tela deil scilla cella ceil relay pilaw fila veil vela villa viola belay hila reoil chela telae delay selah cilia ceili pilea heil pilau paella milia quelea ilia ilea fella
she shea sheugh shew shoe heishi seiche sheesh sheuch