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.
sale sal sole sloe sail sall seal slew slue saul sally solei selle sallow sel sly sol sallowy solo zeal sulu slay sell slow silo syli slaw soil sill soli soul sola seel seely selah silly sully zoeal
ale rale whale wale tale dale sale pale bale male quale kale gale hale vale shale al