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.
decease deices deuces diocese disease dioecies duces daces dices teases daises dieses dassies diecious dazes dioecious doses taces dozes diesis disuse dosses dowses disses tasses tawses douses daisies diseuse dizzies doozies tassies
cease decease eases feases casease cases leases misease peases ceases diocese disease teases