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.
coveter caveator cafeteria cofeature cavitary cafetoria
riveter coveter feater fetter vetoer vetter voter beefeater buffeter hefter lefter defeater defter
covet cavetti cavetto coved cuvette