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.
pouffes pouffs poufs puffs piaffes poofs pooves paves peeves peaveys peavies
bouffes pouffes ruffes waffies toffies taffies ruffs muffs luffas puffs huffs quaffs guffs gaffes cuffs coiffes coffees jiffies baffies pouffs feoffees buffs buffos biffies quiffs luffs piaffes fifes duffs toffees tuffs chuffs fes
pouff pouffe pouffy pouf puff puffy