Indian Ocean vs Ceylon

Indian Ocean and Ceylon both are nouns.

Word	Noun	Adjective	Verb	Adverb
Indian Ocean	Yes	No	No	No
Ceylon	Yes	No	No	No

Indian Ocean (noun)	Ceylon (noun)
the 3rd largest ocean; bounded by Africa on the west, Asia on the north, Australia on the east and merging with the Antarctic Ocean to the south	an island in the Indian Ocean off the southeastern coast of India
	a republic on the island of Ceylon; became independent of the United Kingdom in 1948