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.
loafs leafs loofs loaves loofas lavs loofahs luffs laves loves lavas laighs laughs leaves loughs luffas luvs
loafs oafs coifs coofs gaffs goofs kafs kaifs coffs quaffs caffs boffs raffs safes daffs doffs toffs waffs whoofs chafes sheafs poofs baffs loofs naifs hoofs haafs feoffs leafs loofas naffs howfs novas cafes offs poufs roofs sofas dieoffs doofus tofus waifs woofs chaffs yaffs
loaf leaf leafy loof loofa loofah blaff