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.
lemma lama ylem luma lima lamia limba llama louma lum lam limb lime limo limy loam loom lamb lame
lemma gemma summa nema bema emmy femme hyphemia gemmae gemmy jemmy caeoma comma gamma gumma mamma mammae momma pneuma summae