9 letters · 21 points in Scrabble
adjective able or tending to expand or characterized by expansion
adjective of behavior that is impressive and ambitious in scale or scope
adjective marked by exaggerated feelings of euphoria and delusions of grandeur
originFrom Latin expāns-, past-participle stem of expandere (“to spread out”; see expand) + -ive.
Etymology from Wiktionary, CC BY-SA 3.0