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.
headmen headman hetman hitmen hitman
badmen beadmen deadmen leadmen admen headmen madmen tamein bedemen reedmen madman seedmen daimen stamen headman boatmen meatmen aidmen badman beadman adman putamen batmen rodmen goodmen sidemen leadman deadman woodmen