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.
filature filter floater vulture flatter philtre violator flattery violater floatier fellator fluter falter flitter flutter philter fielder fleeter flouter fluttery valuator folder
filature vulture cloture culture multure
flat filet filiate flauta float floaty folate