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.
moos moose mos moss mozo moas mows meous meows mousy moues mossy mosey mosso mouse miaows mousse miaous mousey mus mis mas mays muss maws mass miso mews mise maes mess masa miss muse mesa massa masse massy messy mezzo missy mussy
boos coos goos loos moos poos zoos woos shoos os