Master
Part of speech: adjective
Definition: masterful main, principal or predominant highly skilled original
Part of speech: verb
Definition: to be a master to control to learn to a high degree of proficiency
Part of speech: noun
Definition: Someone who has control over something or someone. Owner of an animal or slave. The captain of a merchant ship; a master mariner. Someone who employs others. An expert at something. A tradesman who is qualified to teach apprentices. A skilled artist. A courtesy title of a man or a boy; mister. See Master. The original of a document or of a recording. The primary wide shot of a scene, into which the closeups will be edited later. A parajudicial officer (such as a referee, an auditor, an examiner, or an assessor) specially appointed to help a court with its proceedings.
Mistress
Part of speech: noun
Definition: a woman, specifically one with control, authority or ownershipa female teachera woman who (dishonorably) displaces a wife in the affections of a man; a woman, other than his wife, with whom a married man has a continuing sexual relationshipa dominatrix