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.
foetal fetal fatal featly fettle feudal fatally feudally fatly fitly vital footle fattily vedalia vitally fauteuil
foetal setal fetal hyetal metal chaetal petal wetly quietly luteal chital mutual ketol tall cattail medal meatal teal dotal fatal vital beetle coattail ritual stale steal dedal tale tala betel rattail ratal tael pedal natal tali metol ideal tail catalo notal retail cattalo hiatal meetly stall daedal detail total deal coital
fet feat feet feta fete foot footie footy fouette foveate