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.
rituals ratals ritualize radials redials rotls retallies ratels rootles ruddles retails rattles riddles retells ridleys radulas raddles retools retiles rutiles rattails roadless rootless reddles rodless
mutuals rituals details steals stales rattails talus retails ratals mutules tules tails talas tales talls petals taels duals buttals vitals catalos cattails cattalos coattails metals mutuels teals stalls stulls totals