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.
goatees coatees goats gates gats gateaus cates coats gaieties goads gaits gouts cotes quotes coatis catties gaudies cooties goddess goodies cots guts kats gods gads cats qats gauds gudes kites katas goods kotos coeds gutsy gadis coots cutes codes kytes cades codas keets gowds quotas gaddis coitus cutesy guides kotows cottas cuties quoits cuteys caddies codeias cutesie cutties kiddoes kitties kowtows
coatees goatees tees ates bootees tates aedes suttees fates sautes hates rates cates pates bates gates lattes puttees mates sates mateys settees mattes dates nates tutees
goatee gate goat coatee gateau agate gat got