9 letters · 21 points in Scrabble
noun an ambiguous grammatical construction; e.g., `they are flying planes' can mean either that someone is flying planes or that something is flying planes
originFrom Old French amphibolie, from Latin amphibolia, from Ancient Greek ἀμφιβολία (amphibolía, “ambiguity”).
Etymology from Wiktionary, CC BY-SA 3.0