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.
rookery rockery rookier rocker rockier roguery raker racker reeker recarry wreaker wrecker reekier recur rigor regrew rigger rigour rugger require
cookery rookery fakery booker bakery looker mockery knocker poker hocker rockery hokier rocker rookier soaker toker chokier puckery kerry pokier mocker joker jokier cocker cooker kookier quackery locker hookier knackery ocker hooker skerry docker choker shocker
rook rookie rooky broke brook brookie crook troke