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.
pouff pouffe pouffy pouf puff puffy poof poofy piaffe pfui pugh
pouff off buffi buff bouffe luff muff pouf buffy buffo pouffe puff ruff dieoff duff toffy chuff feoff luffa boff boffo howff huffy coff cuff guff quaff quiff huff pouffy puffy ruffe doff toff tuff chuffy