OBSTREPEROUS /ɒbˈstɹɛp.əɹ.əs/ ► audio Scrabble 16 Words With Friends 19 Definition adjective noisily and stubbornly defiant. adjective boisterously and noisily aggressive. See all 719 words you can make from OBSTREPEROUS → 12-letter words Words starting with O Words ending with S ← Unscramble different letters