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.
treated treaded turreted tarted traded derated dreaded trotted hydrated teratoid deaerated darted dratted deratted derided dirtied
created laureated treated ferreted muriated orated carted borated curetted foredate grated lariated greeted farted fretted warted pirated prated cerated serrated deaerated deratted dreaded tarted lyrated breaded hearted ratted curated narrated variated marted berated aurated retted retied garreted redate gyrated aerated treaded crated rated parted pirouetted predate seriated darted derated dratted hydrated turreted charted
treat treaty tret terete trait tread strata strati stretta strette stretti stretto