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.
gats goats gaits gates kats qats guts gads cats gateaus goatees katas gauds cates gutsy goads gaieties gadis coats gouts gaddis coatis catties coatees gaudies cots cads gods kits cuts quads cades kadis qaids caids kytes cutis codas keets gowds coots kotos qadis guids cutes cadis cotes kites gudes goods quits
bats hats seats peats oats gnats lats meats goats kats gats coats cats heats wheats wats cheats tats vats beats qats teats doats rats pats neats mats moats ghats boats eats fats feats fiats chats whats shoats