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.
matured mattered maturate metred mitred metered mitered motored maturity muttered moderate meteorite meteoroid
featured matured sutured natured turd sturdy littered motored nattered guttered tared dured treed catered tired hatred trued gettered toured mattered attired pattered pottered retired retried detoured teetered tottered uttered watered chittered shuttered neutered tried fettered puttered cottered battered bettered stared buttered jittered bittered lettered outread tyred muttered loitered metered mitered petered mitred retread reuttered stored metred tread tattered tittered tutored waitered chattered shattered yattered