A door opener is an object or device used to open a door. The crossword solutions for the term door opener include keycard (7 letters), KNOB (4 letters), latchkey (8 letters), KEY (3 letters), dee (3 letters), dingdong (8 letters), MAID (4 letters), TRAP (4 letters), and passkey (7 letters). A keycard is a type of card used to gain access to a locked area, such as a hotel room or office building. A KNOB is a round handle used to open a door. A latchkey is a KEY that is used to open a door from the outside. A KEY is a metal device used to open a lock. A dee is a metal loop attached to a door that is used to open it. Dingdong is a sound made by a doorbell. A MAID is a person employed to clean and maintain a home. A TRAP is a device used to catch animals. A passkey is a KEY that can be used to open multiple locks.