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.
ampul ampule ampoule ampulla ample amply ampullae
ampul ample temple dimple simply semple amply ampule impel imply jimply compel comply limply pimple pimply rimple rumple rumply sample simple damply dimply wimple