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.
covets covetous caveats cavettos couvades cuvettes cavities gavots qiviuts gavottes
vets civets revets covets duvets rivets fetes buffets lefts davits taffetas divots hefts lovats fetus wefts naivetes tuffets fetas vats haffets efts caveats defeats gavots feats foetus fets pivots soviets whiffets
covet coved caveat caved cavetti cavetto couvade cuvette