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