7 letters · 9 points in Scrabble
noun a soldier in a motorized army unit
noun a mounted policeman
noun a state police officer
originFrom troop + -er, from French troupe. The sense of “one who endures adversity” comes from trouper (“member of an acting troupe”) but through assimilation with the sense of “soldier” has come to be usually spelled “trooper”.
Etymology from Wiktionary, CC BY-SA 3.0