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.
flooder folder fielder flouter floater floatier falter filter fluter flutter flutier fleeter flatter flytier flitter faultier fellator flattery fluttery philter vaulter
flooder colder reloader polder plodder older molder golder clowder loader holder folder bolder bloodier louder looter solder