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.
llama lama lamia lam lamiae lamb luma lame loam lima loamy lamby lemma louma lambie lum limb lime limo limy loom ylem
llama lama ama lam lima samba lamia mamba lame luma loam gama lamb gamay amia amah mama gamma mamma gamba zamia