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.
coomb coombe comb combe combo coma goombay come goombah comma commy gombo comae kombu commie cambia cumbia caeoma cam cum cwm came camo gamb
coomb combo womb tomb doom bombe boom boomy comb combe bomb gombo coombe kombu loom room roomy zombi zoom doomy toom womby
coo cooee cooey coco cocoa coocoo cook cookey cookie cooky chook