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.
tomboy tomb tommy tom tome toom doomy dumbo duomo tammy tummy dom tam
tomboy bamboo womby goombay bimbo embay embow jumbo combo gombo ambo gumbo lamby limbo limby mambo sambo dumbo umbo shamoy