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.
ouphes ouphs oaves
ouphes tophes raphes qophs typhus sophs tophus roughies kophs roughhews raphis ouphs nephews ephas kaphs aphis phis ghees sophies syphs caphs scyphus tophs toughies chefs