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.
fritter fretter fruiter frettier frotteur fruitier frater ferreter fioritura fioriture forrader fioratura fioraturae phratry
fritter critter gritter ritter brattier triter cowriter prettier ratter grittier crittur reutter garotter rotter bruiter rioter writer fretter frettier frotteur fruitier fruiter grottier rattier rewriter ruttier trotter
fritt frit ferity fretty fruit fruity afrit