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.
sphenes saphenas saphenous siphons syphons safeness ciphonies suaveness sevens savines savviness savins
sphenes hyphens toughens dauphines suaveness saphenas safeness roughness roughens rifeness revenues nighness liveness phones caffeines geophones highness avenues venues naiveness daphnes diaphones toughness