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.
fixity fixit fixt fixate fugacity fixed fuguist faggiest foggiest fuggiest
fixity laxity dixit sixty gaseity axite bauxite exit fixit fugacity haecceity jocosity loquacity megacity mucosity rugosity sagacity sequacity zygosity taxite