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.
topee toupee tope tepee top teepee topi type dope tape topo dopey typey topoi taupe tawpie tap tip tup deep dopa dopy dupe tapa tepa tipi typo typp typy
topee whoopee ope pee rupee shoppe lope mope rope epee veepee hoopoe hope cope coupe tepee loupe nope rappee ropey dope teepee tope mopey dopey toupee peep whoopie pope yippee