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.
floatier floater flutier flytier flouter flatter faultier flattery falter filter fluter fleeter flooder flutter flitter fellator filature fluttery vaultier violater folder fielder philter vaulter valuator violator
floatier platier slatier gleetier guiltier blatter alter leadier miltier vaultier latter elater pleater clatter realter salter siltier halter bloater blottier slittier zoolater faultier palter bleater flatter sleetier plater later gloater flytier violater joltier gladier floater maltier sluttier flutier falter plaiter platter plottier relater saltier slater dilater
float floaty flat flauta flota flout folate afloat