Great Arabian Desert vs desert

Great Arabian Desert and desert both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Arabian Desert	Yes	No	No	No
desert	Yes	No	Yes	No

Great Arabian Desert (noun)	desert (noun)
a desert on the Arabian Peninsula in southwestern Asia	arid land with little or no vegetation
	(usually plural) a person's deservingness of or entitlement to reward or punishment

Great Arabian Desert (verb)	desert (verb)
	leave someone who needs or counts on you; leave in the lurch
	leave behind
	desert (a cause, a country or an army), often in order to join the opposing cause, country, or army