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.
doomy doom dom doum toom dome demy duomi tommy douma duomo dummy tomboy dim dam tom deem deme demo dime duma dumb tomb tome dame
roomy boomy doomy mommy toom loom doom zoom room pommy coomb loamy commy homy homey foamy boom tommy womby