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.
shaft shift shifty sheafed chafed shaved chaffed sheaved shiviti sheephead
shaft haft aft ghat ghaut phat heft raft scyphate daft waft shift
chafe chaff chaffy shave shavie sheaf sheave schav