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.
keenness keens kens kines kenos kanes gooeyness queens koines coyness gunnies gayness kins koans canes kaons conns kanas kinos kinas kains cones cannas canoes coneys conies queans
vainness leanness wanness meanness dunness keenness ness ninnies gooeyness lioness bonnes bunnies nowness bennes nannies gneiss wryness woeness pannes pinnies hinnies donnees fewness funnies nines fannies nones shinnies feyness shinneys nonnews rawness joannes bennies nenes jennies minnies newness johnnies finesse tonnes whinnies shannies lowness pennies coyness sonnies dueness tennies tunnies gayness gunnies waeness shyness