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.
sofas soaves safes saves seifs sophs saughs savoys soughs savvies sophies suffuse
loofas sofas fas novas toffs taffias doffs coofs ofays maffias feoffs poofs hoofs howfs coffs fays tufas woofs boffs coifs goofs dieoffs guffaws tofus tafias loofahs doofus loafs loofs roofs whoofs raffias poufs offs oafs mafias luffas chufas