Sahara Desert vs desert

Sahara Desert and desert both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sahara Desert	Yes	No	No	No
desert	Yes	No	Yes	No

Sahara Desert (noun)	desert (noun)
the world's largest desert (3,500,000 square miles) in northern Africa	arid land with little or no vegetation
	(usually plural) a person's deservingness of or entitlement to reward or punishment

Sahara 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