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.
rocketry rocketer rocketeer racketeer racketier ricketier rogatory rectory requiter rector
rocketry coquetry picketer pocketer rocketer
rocked rocket trocked crocket crocked frocked brocket arcked rooked rucked rickety ricked recked rackety racket racked troked