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.
nitrite nitrate nitride nitrid notoriety natured nattered
attrite nitrite trite outwrit stride outride strait outrate citrate nitride patriot nitrate outwrite laterite meteorite attrit tried trait torte diorite patriate retried siderite striate titrate
niter niterie nitery nitre nitro nittier nutria