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.
shucker shocker shicker shaker chukker shakier shikker checker choker chukar shikar shikari chukkar chokier chugger chequer checkrow cheekier chickory shikaree shaggier chickaree chakra chicory chigger
bucker ducker sucker shucker fucker pucker mucker tucker buckra hocker kicker wicker nicker mocker cockier wackier rockery bicker icker locker necker whackier jacker chukker packer shicker quackier puckery quaker knacker lacker knocker picker racker rocker dicker dacker peckier pockier sacker shocker licker checker hacker whacker cocker tacker whicker backer wacker docker wrecker luckier rockier duckier ticker mockery quicker kickier pickeer sicker suckier decker dickier ickier duiker tackier ocker knackery quackery muckier pickier pecker yuckier
shuck chuck chucky shack shacko shock