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.
sall sally sal sallow sale sail sill saul sell seal sallowy selle sully silly scilla sel sly sol soli zill slue syli slaw sola slow soil cell soul sloe sole slay silo seel sulu slew zeal solo cella celli cello seely selah solei zoeal
all ball fall hall call gall lall mall pall sall tall wall shall al