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.
debit debt debut debate dubiety doubt
debit bit debt sobeit hobbit subito cebid rebid bite bitt babbitt habit rebut howbeit cubiti cubit qubit niobite obit rabbit rabbity rebait bait debut