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.
radiance radiancy radians riddance readiness ratines ratanies ruddiness reediness rowdiness redans ratans radons redness rattans retines retains redenies retinues routines rudeness reattains rootiness routinize ruttiness redons rutins
radiance dance audience voidance guidance quittance laitance patience pittance radiancy riddance stance