9 letters · 13 points in Scrabble
noun a large amphitheater in Rome whose construction was begun by Vespasian about AD 75 or 80
originFrom Latin colossēum, from neuter of colosseus (“gigantic”), from Ancient Greek κολοσσιαῖος (kolossiaîos), from κολοσσός (kolossós, “giant statue”). By surface analysis, colossus + -eum.
Etymology from Wiktionary, CC BY-SA 3.0