Pelew vs archipelago

Pelew and archipelago both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pelew	Yes	No	No	No
archipelago	Yes	No	No	No

Pelew (noun)	archipelago (noun)
a chain of more than 200 islands about 400 miles long in the western central Pacific Ocean	a group of many islands in a large body of water