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.
cowmen cowman common combine commune gombeen cumin caiman camion cayman cummin
cowmen bowmen showmen lawmen men foemen noumena vimen omen cowman limen seamen lawman bemean daimen tamein showman baymen yamen amen lomein rumen cymene ramen menu nomen meno numen mean hymen lumen women laymen semen mien demean bowman yeomen
cwm coma comae comb combe combo come comma commie commy coomb coombe