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.
flutter fluttery fluter flitter flouter flutier flatter flattery filter falter floater flytier fleeter floatier faultier folder fielder flooder philter vaulter fellator filature valuator vaultier violater philtra philtre vulture
flutter clutter blatter letter allotter lottery lotter littery vaulter blotter litter coulter glittery platter plottier poulter saluter slittier sluttier blottier latter flattery cluttery flouter fluter flutier fluttery clatter clouter flitter clattery flatter glitter moulter plotter polluter reletter slitter slotter diluter
flauta flout flute flutey fluty fluyt