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.
stock stocky stick stack stoic stoke stook stuck sticky sodic stake steak steek stag
bittock buttock stock futtock mattock stocky paddock stick piddock dock attack stoke tuck stuck redock shaddock ruddock retook toke haddock took stack tack tick stoic reattack stook betook detick retack shtick