East India vs East Indies

East India and East Indies both are nouns.

Word	Noun	Adjective	Verb	Adverb
East India	Yes	No	No	No
East Indies	Yes	No	No	No

As nouns, East India and East Indies are synonyms defined as:

East India and East Indies: a group of islands in the Indian and Pacific Oceans between Asia and Australia

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

East India (noun)	East Indies (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