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.
wrecker wreaker racker reeker rocker reekier rockery rockier raker recur rookery recarry rookier regrew regrow rigger rugger require roguery
necker wrecker pecker decker checker dacker knocker quackier docker tucker licker duckier whacker picker whicker sicker hocker hacker fucker bicker bucker quackery quicker mucker peckier shucker shicker reeker rockier packer lacker puckery dicker knacker tackier wackier rocker beaker knackery muckier seeker locker pockier ickier ocker nicker icker mocker pickeer whackier meeker wreaker jacker wacker cocker dickier leaker suckier tacker mockery luckier sucker backer cockier rockery reekier racker pucker pickier ticker geekier weaker sacker kickier kicker ducker wicker cheekier shocker yuckier
wreck reck wrack wreak wrick dreck drecky rec