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.
rattails ratals rattles retails ratels rutiles retiles radials rotls retallies ridleys rootles riddles retells rituals retools raddles redials radulas roadless rootless reutilize
cattails tails details coattails retails rattails tils rutiles catalos mutuals stales petals tiles talls vitals steals motiles retiles stalls stiles cattalos talus tales toils nautilus metals ratals rituals buttals tills taels talas teals stills totals
rattail ratal rattle rattly brattle prattle