Iles Marquises vs Marquesas Islands

Iles Marquises and Marquesas Islands both are nouns.

Word	Noun	Adjective	Verb	Adverb
Iles Marquises	Yes	No	No	No
Marquesas Islands	Yes	No	No	No

As nouns, Iles Marquises and Marquesas Islands are synonyms defined as:

Iles Marquises and Marquesas Islands: a group of volcanic islands in the south central Pacific; part of French Polynesia

Iles Marquises (noun)	Marquesas Islands (noun)
a group of volcanic islands in the south central Pacific; part of French Polynesia	a group of volcanic islands in the south central Pacific; part of French Polynesia