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.
lamb lamby lam lambie limb loam lame lama limbi loamy lamia limba llama limby limbo lamiae lum lima lime limo limy loom luma ylem lemma limey louma