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.
reattains rattans retains ratans ratines retines rattons rattens retinas rattoons retinues ratanies ratteens readiness ruttiness redans rutins radians retenes ratoons retunes routines reediness rootiness radons redons rottenness rhytons reddens redness radiancy redenies rudeness routinize rowdiness ruddiness
reattains attains tains betaines lattins mattins rattans retains stains detains titans tans tins