Palmer Peninsula vs Antarctic continent

Palmer Peninsula and Antarctic continent both are nouns.

Word	Noun	Adjective	Verb	Adverb
Palmer Peninsula	Yes	No	No	No
Antarctic continent	Yes	No	No	No

Palmer Peninsula (noun)	Antarctic continent (noun)
a large peninsula of Antarctica that extends some 1200 miles north toward South America; separates the Weddell Sea from the South Pacific	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