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.
retail retile rattail retally readily ratal ritual retell rutile retool redial radial ruttily reedily rotl radialia radially ritually ratel redly radula rattly reddle rudely rowdily ruddily
tail retail cattail coattail detail rattail til ratal dotal steal fetal knottily till still setal retile wittily doughtily motile total nattily notal petal tile ritual ruttily sootily stall stile stale vital fattily cattalo cattily chital coital chattily metal pettily catalo nautili tattily toil tall goutily meatily futile tale mutual daily dottily utile chaetal natal meatal rutile teal nuttily luteal tael fatal tala tali haughtily hiatal foetal hyetal
ret arete treaty tread reared oread great create fretty fret bready bread rota read retie rete reata ready readd pretty dread treat tret