Palmer Peninsula vs Antarctic Peninsula

Palmer Peninsula and Antarctic Peninsula both are nouns.

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

As nouns, Palmer Peninsula and Antarctic Peninsula are synonyms defined as:

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

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