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