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.
vainness vines vanes vinasse finesse vans fannies fines vinos fanes veins vinas vinous venues faience feyness funnies fewness fins fans fanos fauns finis fawns venus foins finos faenas faunas fiance phones veenas venose venous
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