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.
safes saves soaves savvies seifs sofas saughs savoys sieves sophies suffice suffuse zouaves
cafes safes chafes fes taffies toffies daffs defies eaves soaves biffies piaffes leafs haafs heaves jiffies bouffes faves waffs coffees laves kafs naffs sheaves shaves quaffs loafs fifes knaves naves jefes wifes oaves raffs reaves roofies gaffes caffs fees leaves deaves loaves baffs fehs haves fess caves baffies kaifs coiffes feoffees gaffs ruffes knifes waves aves naifs wifeys weaves waifs waffies toffees deifies zouaves feus saves foes raves pouffes paves oafs chaffs sheafs reifies yaffs