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.
niobates niobites nobodies
abates rebates niobates debates bates bats qubytes batts beats rowboats niobites sabbats labiates rabatos bytes towboats boats abatis bahts rabats rebaits aubades rebatos butes rubatos baits zaibatsu diabetes bites showboats