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.
ritual ritually ratal radial redial radiale retally rotl radialia radially ratel raddle rutile riddle ruddle rattly retail retell retool rootle retile ridley radula rattle rudely radulae rattail readily reedily rowdily ruddily ruttily
mutual ritual dual fetal feudal foetal vital hiatal fatal catalo coattail cattalo metal mutuel natal tael stale steal detail total chital luteal petal teal coital rattail tall retail ratal notal mutule tali meatal tule caudal cattail tail tala tale setal stall stull dotal chaetal hyetal
raita riata riot rite writ write brit britt frit fritt crit grit gritty trite