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.
quackery quackier quaker quicker quakier cookery quaggier cakier cocker cooker kicker gawker cockier gawkier kickier kukri cougar gagger kegger
quackery puckery mockery knackery rockery pickeer pickier cocker jacker ickier fucker backer sacker hickory hocker racker fakery necker ocker pecker whacker kicker ticker pucker shucker rookery shicker checker wacker hacker cockier whicker skerry icker decker muckier suckier dickier ducker tacker duckier bakery kickier kerry quicker luckier licker knocker quackier wrecker tackier cookery mocker bicker locker rocker packer nicker tucker lacker whackier sicker docker dicker sucker knacker dacker bucker wackier pockier mucker peckier picker wicker chickory rockier shocker yuckier cry
quack quacky quake quaky quick quickie