Tuamotus vs archipelago

Tuamotus and archipelago both are nouns.

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

Tuamotus (noun)	archipelago (noun)
a group of about 80 coral islands in French Polynesia	a group of many islands in a large body of water