Antarctica vs Antarctic Peninsula

Antarctica and Antarctic Peninsula both are nouns.

Word	Noun	Adjective	Verb	Adverb
Antarctica	Yes	No	No	No
Antarctic Peninsula	Yes	No	No	No

Antarctica (noun)	Antarctic Peninsula (noun)
an extremely cold continent at the south pole almost entirely below the Antarctic Circle; covered by an ice cap up to 13,000 feet deep	a large peninsula of Antarctica that extends some 1200 miles north toward South America; separates the Weddell Sea from the South Pacific