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.
kafs kaifs kvas kifs kefs kavas caffs kiefs kufis kaphs kvass cafes keefs kivas gaffs quaffs kavass gaffes kiaughs caphs goofs cuifs cuffs coifs caves kophs coofs guffs coffs
haafs kafs leafs loafs oafs sheafs