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.
radians radiancy radiance radons ratans redans readiness rattans ratines retains ratanies reattains ruddiness reediness rowdiness rutins redons reddens redness rattons ratoons rattens retines ratteens rattoons riddance redenies retinues rudeness routines rootiness ruttiness retenes retinas retunes rhytons
medians radians dans dins mueddins shaitans dawns titans deans soudans dines sedans dinos boudins medinas beduins ladinos hoddins redans fadeins seitans iodines dedans iodins witans codeins sheitans