Malay Archipelago vs The Malay Archipelago

Malay Archipelago and The Malay Archipelago both are nouns.

Word	Noun	Adjective	Verb	Adverb
Malay Archipelago	Yes	No	No	No
The Malay Archipelago	Yes	No	No	No

As nouns, Malay Archipelago and The Malay Archipelago are synonyms defined as:

Malay Archipelago and The Malay Archipelago: a group of islands in the Indian and Pacific Oceans between Asia and Australia

Other synonyms of Malay Archipelago include East India, East Indies.

Malay Archipelago (noun)	The Malay Archipelago (noun)
a group of islands in the Indian and Pacific Oceans between Asia and Australia	a group of islands in the Indian and Pacific Oceans between Asia and Australia