card

A playing card.

Any game using playing cards; a card game.

A resource or argument, used to achieve a purpose. (See play the something card.)

Any flat, normally rectangular piece of stiff paper, plastic, etc.

A bank card.

Any electronic payment (rather than a cash payment using notes, bills or coins).

Paper that is thicker and more durable than normal writing or printing paper, but thinner and more flexible than paperboard, used for postcards, playing cards, etc.; card stock.

A map or chart.

An amusing or entertaining person, often slightly eccentric.

A list of scheduled events or of performers or contestants; chiefly used in professional wrestling.