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.
autumn automen automan atman ataman autoimmune adman admen aidman aidmen
autumn hetman titman potman pitman outman meatmen meatman hitmen hitman footmen atman footman boatmen boatman bitumen batmen batman pitmen potmen titmen