Syrian Desert vs Saudi Arabia

Syrian Desert and Saudi Arabia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Syrian Desert	Yes	No	No	No
Saudi Arabia	Yes	No	No	No

Syrian Desert (noun)	Saudi Arabia (noun)
a desert of northern Arabia occupying western Iraq, southern Syria, eastern Jordan, and northern Saudi Arabia	an absolute monarchy occupying most of the Arabian Peninsula in southwest Asia; vast oil reserves dominate the economy