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.
ratteens rattens rattans rattons rattoons ratans reattains reddens rottenness ratoons retenes ratines redenies ratanies ruttiness reediness redans rutins redons radons radians retains retines retunes rhytons redness retinues routines rudeness readiness rootiness
teens sateens lateens poteens ratteens potteens tens battens lattens teensy latens tense pattens mittens ketenes dudeens rattens whitens neatens wheatens luteins tautens butenes fattens stenos catenas patens heightens retenes steins kittens quietens chutnees
ratteen ratten rattan ratton rattoon reattain rotten