(n.) A term or word which is the opposite of, or antithesis to, another; an antonym; -- the opposite of synonym; as, foe is the counterterm of friend.

China Darkest Africa God knows where Greenland North Pole Outer Mongolia Pago Pago Pillars of Hercules Siberia South Pole Thule Tierra del Fuego Timbuktu Ultima Thule Yukon antipodal points antipode antipoints antipole antipoles antithesis antonym black and white contra contraposita contrapositives contraries converse counter counterbalance countercheck counterpoint counterpoise counterpole counterpoles counterterm foil frontier godforsaken place inverse jumping-off place night and day nowhere obverse offset opposite opposite number opposite poles opposites outback outer space outpost outskirts polar opposites pole poles reverse setoff the Great Divide the South Seas the boondocks the contrary the moon the other side the sticks the tullies vis-a-vis