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.
ratanies ratans ratines rattans reattains retenes rattons rattens retunes ratoons retines radians retains rattoons ratteens redenies retinues radiance routines routinize ruttiness rootiness readiness rutins redans radons rottenness redness rhytons radiancy riddance rudeness reediness rowdiness ruddiness redons
botanies litanies tetanies ratanies dittanies butanes titaness betonies tetanise soutanes tunnies mutinies redenies danios denies tawnies phytanes townies tennies neotenies atonies cetanes stanes botanise botanize betaines tetanize toonies titanias