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.
rockets rickets rackets roquets roquettes reacts rectus recuts rictus ragouts recoats recodes regattas requites ricottas rectos
beckets buckets tuckets jackets lockets packets pickets pockets rackets rickets rockets sockets dockets tackets tickets wickets keets skeets
rocked rocket trocked crocket crocked frocked brocket arcked rooked rucked rickety ricked recked rackety racket racked troked