desert vs Sahara Desert

desert and Sahara Desert both are nouns.

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

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

desert (verb)	Sahara 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