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.
wreaker wrecker raker reeker racker reekier rocker recarry rockier rookery rookier rockery recur regrew regrow rigger rugger require roguery
beaker wreaker weaker leaker quaker whacker taker baker fakery seeker gawker cakier quakier oakier decker shakier cheekier knacker dacker jacker peakier geekier hawker hacker backer reeker waker beakier maker racker sacker bakery reekier pecker necker lacker lakier faker laker leakier shaker fakeer checker raker packer wrecker saker soaker daiker tacker wacker meeker yakker
wreak wrack wreck break freak freaky creak creaky