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.
carboys carbos carbs carabaos caribous carobs caribes garbs cribs curbs crabs corbies grabs grubs kerbs grebes krubis
carboys choirboys verbose jerboas carbos sorbose turbos ytterbous
carbo carboy carb carabao caribe caribou carob