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.
dock doc duck dick deck ducky dicky duckie dickey dickie dog dak deke took duke dyke dike tack dago dawk tick deco toke tuck decay decoy dekko dikey doggo doggy dykey tacky tokay
bock hock jock cock lock mock knock nock pock rock sock dock chock shock yock