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.
deck deco duck dick deke dock decay decoy dicky ducky dekko dickie duckie dickey dak doc dawk dike duke dyke tack teak tick tuck dikey dykey tacky
beck feck heck geck keck neck peck reck wreck deck check