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.
cooks cookeys cookies cocos kooks cocks gooks cokes cocoas cogs cuckoos gucks kicks cakes cocas gogos kecks cukes gowks cacaos guacos quacks quicks cox quokkas quickies coax coxa kegs
books nooks shooks chooks rooks hooks cooks looks sooks gooks kooks zooks sokes gowks hocks cocos hookas bocks goos knocks jouks socks woks locks logos okes bookoos zouks tokes oaks chocks gogos yokes howks pocks boocoos jokes souks cocks coos mocks cokes hokes nocks mokes goose soaks locos okas goosy pokes rocks docks cuckoos shocks jocks yocks chokes yoks
cookey cook cookie cooky cock cocky coco cocoa coke coky coocoo gook gooky kook kookie kooky