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.
carabaos carbos carboys carbs crabs caribous carobs caribes grabs cribs garbs curbs corbies grubs kerbs grebes krubis
carabao carb crab carbo carboy caribe caribou carob crabby scarab scarabaei