land vs department

land and department both are nouns.

Word	Noun	Adjective	Verb	Adverb
land	Yes	No	Yes	No
department	Yes	No	No	No

land (noun)	department (noun)
agriculture considered as an occupation or way of life	a specialized sphere of knowledge
a politically organized body of people under a single government	a specialized division of a large organization
the people who live in a nation or country	the territorial and administrative division of some countries (such as France)
territory over which rule or control is exercised
the territory occupied by a nation
the solid part of the earth's surface
material in the top layer of the surface of the earth in which plants can grow (especially with reference to its quality or use)
extensive landed property (especially in the country) retained by the owner for his own use
the land on which real estate is located
a domain in which something is dominant

land (verb)	department (verb)
bring into a different state
reach or come to rest
cause to come to the ground
arrive on shore
bring ashore
shoot at and force to come down
deliver (a blow)