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.
flattery flatter fluttery floater flitter flutter floatier fluter filter falter flouter flutier flytier fleeter faultier fellator filature violater folder fielder flooder philter vaulter valuator vaultier violator
littery glittery cluttery fluttery flattery lottery clattery blatter blottier platter flitter plottier clutter slitter lotter slotter flutter letter blotter glitter latter litter plotter clatter reletter allotter slittier flatter sluttier
flat flauta float floaty folate