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.
gummatous gummites gambados gumboots comatose gambadoes gamuts commodious commits gambits combats gomutis gametes comates commodes commutes gambades quomodos committees
gummatous meatus amadous vomitous comatose mammatus tomatoes mats