8 letters · 14 points in Scrabble
noun a pistol with a revolving cylinder (usually having six chambers for bullets)
noun a door consisting of four orthogonal partitions that rotate about a central pivot; a door designed to equalize the air pressure in tall buildings
originFrom revolve + -er, coined by American inventor Samuel Colt in 1835.
Etymology from Wiktionary, CC BY-SA 3.0