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.
yeahs yeas yes wyes yaws yays yews yous yows
yeahs ahs aahs dahs seas pehs pease peas lease leas queasy hehs keas hahs tease fease easy ease beaus cease zoeas teas toeas sheas fehs shahs yeas