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.
sloe slew sole silo sale slow slue solo solei selle sallow sal sol sel sly sallowy syli soil sola sell sail slay soli sall seel seal saul sill slaw soul sulu cello sally seely selah silly sully zoeal