Possible to master; able to be mastered.

Agent noun of master: one who masters.

plural of masterer

Clipping of master's degree.

Prepended to a boy's name or surname as a (now somewhat formal) form of address. / A religious teacher, often as an honorific title. / The title of the head of certain colleges and schools.

(Wicca) One of the triune gods of the Horned God in Wicca alongside the Father and Sage and representing a boy or a young man / (banking) MasterCard

(intransitive) To be a master. / (transitive) To become the master of; to subject to one's will, control, or authority; to conquer; to overpower; to subdue.

Someone who has control over something or someone. / The owner of an animal or slave. / (nautical) The captain of a merchant ship; a master mariner. / (dated) The head of a household.

Masterful. / Main, principal or predominant. / Highly skilled. / Original.

(nautical, in combination) A vessel having a specified number of masts.