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.
tuatara tuatera tatar tutor tetra tater datura tatter datary touter tattier tattooer titer toter dater tetri titre titter detour teeter tauter tooter dotter tetter tawdry totter deodara dietary dottier tottery
tuatara satara attar hetaera hetaira datary datura tatar tuatera wheatear tar