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.
coombe coomb combe comb come comae combo commie goombay goombah coma came commy gombo comma gambe kombu caeoma cambia cammie cumbia cam cum cwm
combe bombe coombe womb kombu tomb comae zombie comb some coomb romeo come nome combo mome gambe imbue jambe homie homey home bomb biome gombo lambie gnome pome roomie zombi dome tome womby
coo cooee cooey coco cocoa coocoo cook cookey cookie cooky chook