Rub al-Khali vs desert

Rub al-Khali and desert both are nouns.

Word	Noun	Adjective	Verb	Adverb
Rub al-Khali	Yes	No	No	No
desert	Yes	No	Yes	No

Rub al-Khali (noun)	desert (noun)
a desert in southern Saudi Arabia	arid land with little or no vegetation
	(usually plural) a person's deservingness of or entitlement to reward or punishment

Rub al-Khali (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