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.
daughter doughtier dater tauter doter tater deter dotter dieter datura touter dotier deader datary tatter dottier tattier tuatera tattooer tetri tetra tutor toter titer tatar detour teeter tetter tidier titter tooter totter deodar tedder dodder
daughter doughier hater haughtier gater doughtier whiter