answer

fe’l verb

1. To make a reply or response to. He answered the question.
2. To speak in defence against; to reply to in defence. to answer a charge or accusation
3. To respond to a call by someone at a door or telephone, or other similar piece of equipment. Nobody answered when I knocked on the door.
4. To suit a need or purpose satisfactorily. It answers the need.

ot noun

1. A response or reply; something said or done in reaction to a statement or question. Her answer to his proposal was a slap in the face.
2. A solution to a problem. There is no simple answer to corruption.
3. A document filed in response to a complaint, responding to each point raised in the complaint and raising counterpoints.