11 letters · 16 points in Scrabble
noun a person or animal that is markedly unusual or deformed
noun something hideous or frightful
originFrom Middle English monstruosite, from Middle French monstruosité and its etymon Late Latin mōnstruōsitās, mōnstrōsitās (“monstrousness”), from Latin mōnstruōsus, mōnstrōsus; by surface analysis, monstrous + -ity.
Etymology from Wiktionary, CC BY-SA 3.0