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.
boomy boom bomb biome beamy bombe bamboo bam bum beam bema bima
roomy boomy doomy mommy toom loom doom zoom room pommy coomb loamy commy homy homey foamy boom tommy womby