5 letters · 10 points in Scrabble
noun an allergic reaction that becomes apparent in a sensitized person only minutes after contact
originFrom Ancient Greek ἀτοπία (atopía, “extraordinary nature”), from ἄτοπος (átopos), from ἀ- (a-) + τόπος (tópos, “place”).
Etymology from Wiktionary, CC BY-SA 3.0