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.
casette cassette caseate caste cast gazette coast coset cased caused casita cosset cassata coesite gaseity cost gast cosied costae cussed gassed gusset keyset
fossette casette cassette rosette poussette noisette musette sett mozette nauseate settee gazette caseate bassett setae roseate mozzette set