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.
daphnes dauphines diaphones diaphonies daphnias dauphins diaphanous deafness daffiness davens divans defines divines typhons deafens defiance deviance typhoons tiffanies toughness devons dovens defence defense deveins
daphnes hyphens phones phons highness geophones nighness roughness siphons sphenes syphons dauphines dauphins diaphones toughness typhons
daphne daphnia dauphin dauphine diaphone diaphony