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.
zaffre zaffar zaffer zaffir safer safari suffer suffari
zaffre afore reoffer puffer offer goffer quaffer coiffure coffer feoffor gaffer feoffer buffer doffer deffer whiffer zaffir chauffer zaffar fare afire gauffer zaffer suffer refire piaffer kaffir niffer fire fore fere frae free froe duffer differ chaffer before chuffer