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.
eses eases esses essays
asses busses chesses passes hawses fuses wisses nouses kisses causes tasses nesses phases hoises susses losses liaises guesses wrasses mioses esses bosses gausses raises gases bouses looses buses fesses vases nooses lases peases bowses eses chases yeses chooses chausses chaises uses teases douses dieses sisses cesses rouses reuses puses pisses chouses meioses houses touses doses seises rooses poses oses gneisses eases misses josses mouses cuisses muses lyses leases leses bases masses lasses noses vises fosses biases loses bises gasses rases gooses baases feases mises ceases loesses beses louses daises hoses physes noises tawses coses quasses oases wusses fusses hisses pauses chiauses peises guises biasses messes musses cusses mousses cases mosses basses gnoses pases posses roses sises dosses tusses jesses chowses chasses poises pusses rises ruses sasses souses disses dowses tosses wises chaoses cheeses choses yesses