Great Australian Desert vs desert

Great Australian Desert and desert both are nouns.

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

Great Australian Desert (noun)	desert (noun)
general name given to all desert areas in Australia	arid land with little or no vegetation
	(usually plural) a person's deservingness of or entitlement to reward or punishment

Great Australian 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