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.
leprosy leprose leprous lepers leapers lopers lappers lippers loopers loppers
leprosy prosy pros praos proas prose proso pross prows pursy pyros cuprous leprose leprous repros uprose