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.
hook hooka hooky hookey hookah howk hoke hock hokey hoick hokku hockey hog hack hawk hake haku hogg hike haik heck hick huck haika haiku
book hook cook gook kook look nook rook sook took chook shook