Occident vs Western world

Occident and Western world both are nouns.

Word	Noun	Adjective	Verb	Adverb
Occident	Yes	No	No	No
Western world	Yes	No	No	No

As nouns, Occident and Western world are synonyms defined as:

Occident and Western world: the countries of (originally) Europe and (now including) North America and South America

Other synonyms of Occident include West.

Occident (noun)	Western world (noun)
the countries of (originally) Europe and (now including) North America and South America	the countries of (originally) Europe and (now including) North America and South America