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.
kefs kiefs keefs kifs kafs kufis kaifs keeves kvas kavas coofs cuffs kivas kaphs guffs goofs cafes caffs cuifs gaffs caves coves coffs coifs kophs kvass
beefs efs fiefs keefs kefs kiefs reefs refs chefs chiefs