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.
cittern citrin citron stern cedarn sterna citrine stearin sauterne stearine strewn strown sadiron styrene
gittern pattern cittern bittern tern outturn sterna stern sauterne pterin veteran outearn cateran eterne attorn terne deuteron