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.
automen automan autumn autoimmune admen atman aidmen ataman adman aidman
automen goodmen titmen routemen radiomen putamen potmen pitmen ottoman meatmen gatemen toman hitmen footmen boatmen bitumen batmen automan rodmen stamen woodmen