Saudi Arabia vs Organization of Petroleum-Exporting Countries

Saudi Arabia and Organization of Petroleum-Exporting Countries both are nouns.

Word	Noun	Adjective	Verb	Adverb
Saudi Arabia	Yes	No	No	No
Organization of Petroleum-Exporting Countries	Yes	No	No	No

Saudi Arabia (noun)	Organization of Petroleum-Exporting Countries (noun)
an absolute monarchy occupying most of the Arabian Peninsula in southwest Asia; vast oil reserves dominate the economy	an organization of countries formed in 1961 to agree on a common policy for the production and sale of petroleum