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.
piaffes pouffes paves puffs pouffs peaveys peavies pavis poofs poufs pavise peeves pooves pavisse
gaffes piaffes chaffs waffs toffies taffies safes raffs cafes naffs quaffs gaffs coiffes coffees caffs baffies jiffies fifes feoffees bouffes biffies baffs pouffes ruffes daffs toffees waffies chafes yaffs fes