Sinai Desert vs Sinai

Sinai Desert and Sinai both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sinai Desert	Yes	No	No	No
Sinai	Yes	No	No	No

As nouns, Sinai Desert and Sinai are synonyms defined as:

Sinai Desert and Sinai: a desert on the Sinai Peninsula in northeastern Egypt

Sinai Desert (noun)	Sinai (noun)
a desert on the Sinai Peninsula in northeastern Egypt	a peninsula in northeastern Egypt; at north end of Red Sea
	a desert on the Sinai Peninsula in northeastern Egypt
	a mountain peak in the southern Sinai Peninsula (7,500 feet high); it is believed to be the peak on which Moses received the Ten Commandments