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.
puffery puffer puffier piaffer paver paviour
puffery coiffeur reoffer feoffer piaffer niffer gauffer gaffer miffier coffer quaffer iffier doffer chaffer wafery chauffer deffer chuffer zaffer huffier fifer faery daffier suffer puffier puffer offer goffer fiery ferry affray buffer buffier duffer chaffier whiffer chauffeur differ chuffier fer fry
puff pouff pouffe pouffy puffy