land has 30 distinct synonyms spread across 15 of its 18 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
the land on which real estate is located
“he built the house on land leased from the city”
material in the top layer of the surface of the earth in which plants can grow (especially with reference to its quality or use)
“the land had never been plowed”
the solid part of the earth's surface
“the plane turned away from the sea and moved back over land”
the territory occupied by a nation
“he returned to the land of his birth”
extensive landed property (especially in the country) retained by the owner for his own use
“the family owned a large estate on Long Island”
a politically organized body of people under a single government
“the state has elected a new president”
United States inventor who incorporated Polaroid film into lenses and invented the one step photographic process (1909-1991)
agriculture considered as an occupation or way of life
“farming is a strenuous life”
Synonyms, antonyms and the broader and narrower relations for land come from Princeton University’s WordNet. Full sources and licences.
cause to come to the ground
“the pilot managed to land the airplane safely”
deliver (a blow)
“He landed several blows on his opponent's head”