Greenland vs Kalaallit Nunaat

Greenland and Kalaallit Nunaat both are nouns.

Word	Noun	Adjective	Verb	Adverb
Greenland	Yes	No	No	No
Kalaallit Nunaat	Yes	No	No	No

As nouns, Greenland and Kalaallit Nunaat are synonyms defined as:

Greenland and Kalaallit Nunaat: the largest island in the world; lies between the North Atlantic and the Arctic Ocean; a self-governing province of Denmark

Other synonyms of Greenland include Gronland.

Greenland (noun)	Kalaallit Nunaat (noun)
the largest island in the world; lies between the North Atlantic and the Arctic Ocean; a self-governing province of Denmark	the largest island in the world; lies between the North Atlantic and the Arctic Ocean; a self-governing province of Denmark