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.
luma louma lum lima lama llama limba lamia lemma lamiae lam limb limy lame loom loam lime limo lamb ylem lamby limbi limbo limby limey loamy
louma luma pneuma puma douma duma ma um