(chess) The quickest possible checkmate in the game of chess.

(nautical) An officer on a merchant ship next in rank to the captain and responsible to the captain for the safety and security of the ship.

(politics) A candidate on a joint ticket. / (politics) A candidate for the US vice-presidency. / One of a pair of ships with coordinated, often reciprocal, sailing schedules.

(baseball) One who plays in the same battery, either the pitcher or the catcher.

Alternative spelling of teammate

Alternative spelling of schoolmate

Alternative spelling of soulmate

Ilex paraguariensis, a plant used to make maté.

Alternative spelling of tourmate

(colloquial, Australia) An elderly man. / (colloquial, Australia, UK) In general, any person, whose specific identity can be deduced from context.