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.
nitroso nitros nitrous nitres niters niteries knitters noters nadirs natures nutrias neuters netters natters nutters knotters notorious needers nodders
nitroso trows strows retros outrows nitros metros goitrous cuatros heteros tyros troys trooz taros trois trios torso toros tiros nitrous petrous citrous stroys
nitro niter niterie nitery nitre intro