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.
fluter flutter flutier flouter fluttery filter falter flitter floater fleeter flytier flatter flattery floatier faultier folder fielder flooder philter vaulter fellator filature valuator vaultier violater philtra philtre vulture violator
flouter polluter fluter saluter diluter clouter melter falter plater vaulter bloater coulter blottier gloater filter saltier floatier colter lotter muleteer litter gauleiter fluttery flutter glitter haltere later realter violater looter billeter reletter welter dilutor dilater zoolater platier slotter slitter plaiter slatier siltier cluttery flitter pleater miltier belter jolter louder moulter palter latter plottier liter bleater quilter blighter blatter colluder clattery platter plotter lauder poulter faultier loiter littery flatter halter bolter philter glittery flutier salter eluder guiltier elater flytier fleeter vaultier milter clatter jilter gleetier lottery kelter flattery blotter floater joltier relater alter kilter maltier deluder molter pelter politer balloter allotter letter slater sleetier slittier sluttier clutter tilter shelter
flutey flute fluty felt flat flauta flit flite flota flout flued fluid fluyt flyte