captain vs master

captain

verb
  • To act as captain 

  • To exercise command of a ship, aircraft or sports team. 

noun
  • An honorific title given to a prominent person. See colonel. 

  • The head boy of a school. 

  • A maître d', a headwaiter. 

  • A chief or leader. 

  • An army officer with a rank between the most senior grade of lieutenant and major. 

  • A naval officer with a rank between commander and commodore. 

  • The person lawfully in command of a ship or other vessel. 

  • One of the athletes on a sports team who is designated to make decisions, and is allowed to speak for his team with a referee or official. 

  • A commissioned officer in the United States Navy, Coast Guard, NOAA Corps, or PHS Corps of a grade superior to a commander and junior to a rear admiral (lower half). A captain is equal in grade or rank to a United States Army, Marine Corps, or Air Force colonel. 

  • The leader of a group of workers. 

master

verb
  • To be a master. 

  • To earn a Master's degree. 

  • To become the master of; to subject to one's will, control, or authority; to conquer; to overpower; to subdue. 

  • To learn to a high degree of proficiency. 

  • To make a master copy of. 

noun
  • Someone who has control over something or someone. 

  • A parajudicial officer (such as a referee, an auditor, an examiner, or an assessor) specially appointed to help a court with its proceedings. 

  • A vessel having a specified number of masts. 

  • The original of a document or of a recording. 

  • A male dominant. 

  • A master's degree; a type of postgraduate degree, usually undertaken after a bachelor degree. 

  • The primary wide shot of a scene, into which the closeups will be edited later. 

  • A tradesman who is qualified to teach apprentices. 

  • The owner of an animal or slave. 

  • A skilled artist. 

  • Someone who employs others. 

  • A person holding an office of authority, especially the presiding officer. 

  • A person holding such a degree. 

  • The captain of a merchant ship; a master mariner. 

  • An expert at something. 

  • A device that is controlling other devices or is an authoritative source. 

  • A person holding a similar office in other civic societies. 

adj
  • Original. 

  • Masterful. 

  • Main, principal or predominant. 

  • Highly skilled. 

How often have the words captain and master occurred in a corpus of books? (source: Google Ngram Viewer )