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.
arts airts artsy aortas aretes ariettas ariettes aroids arduous arrowwoods
airts hearts worts warts tarts darts ports morts quirts orts quarts karts courts carts girts shorts cherts hurts harts parts shirts charts whorts torts dirts sorts nerts arts marts boarts borts farts forts verts yurts