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.
matron madrona madrone madrono midiron modern moderne
biotron natron matron citron waitron neutron patron diatron torn godroon trona strown tarn durion drown drone trone ladrone tern madrona gadroon outthrown ladron pattern return gittern diuron padrone hadron midiron stern bittern outrun deuteron madrono turion madrone quadroon sadiron outran cittern turn outturn padroni attorn patroon retorn citrin
madre mater matier matter mattery mature meatier metre metro mitre amateur amatory smatter