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.
mulla mullah mull mulley mollah mell mall mill maul mola mule mouille moll mille milia muley muhly molly maill miaul moola mallei mellow mollie mallow moolah mallee mol mil mel male meal milo moil mole moly mool mail mewl mile
bulla mulla cully cull hulloa holloa hilloa hull foully hallah halloa villae villa fully full quoll fellah null olla pallia pull cellae sully doula dull tulle wallah challah mollah gully hullo gull quill lull mull fella bully bullae boulle bull quillai holla allay hula cullay calla quell mullah nullah paella pula cella scilla zillah dulia dully walla challa cholla