OBSERVATORY /əbˈzəːvət(ə)ɹi/ ► audio Scrabble 19 Words With Friends 20 Definition noun a building designed and equipped to observe astronomical phenomena. noun a structure commanding a wide view of its surroundings. — synonyms: lookout, observation_tower, lookout_station See all 573 words you can make from OBSERVATORY → 11-letter words Words starting with O Words ending with Y ← Unscramble different letters