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.
mermen merman
airmen germen chairmen carmen mermen doormen barmen rumen dairymen ferrymen cerumen freemen firemen quarrymen crewmen ramen harmin airman wiremen vermin foremen foramen dormin duramen merman carman premen doorman barman german firman jurymen sermon chairman draymen choremen