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