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.
mas mays moas mass maws masa maes masse massa massy miaows mos miaous mis mus miso mace mise muss mesa mess mazy moss moos muse miss mows maze mews moues mossy moose mousy mosey missy meous mouse messy mosso maize meows mussy missay mousey mousse