Sinai Peninsula vs Sinai

Sinai Peninsula and Sinai both are nouns.

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

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

Sinai Peninsula and Sinai: a peninsula in northeastern Egypt; at north end of Red Sea

Sinai Peninsula (noun)	Sinai (noun)
a peninsula in northeastern Egypt; at north end of Red Sea	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