Sultanate of Oman vs Muscat and Oman

Sultanate of Oman and Muscat and Oman both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sultanate of Oman	Yes	No	No	No
Muscat and Oman	Yes	No	No	No

As nouns, Sultanate of Oman and Muscat and Oman are synonyms defined as:

Sultanate of Oman and Muscat and Oman: a strategically located monarchy on the southern and eastern coasts of the Arabian Peninsula; the economy is dominated by oil

Other synonyms of Sultanate of Oman include Oman.

Sultanate of Oman (noun)	Muscat and Oman (noun)
a strategically located monarchy on the southern and eastern coasts of the Arabian Peninsula; the economy is dominated by oil	a strategically located monarchy on the southern and eastern coasts of the Arabian Peninsula; the economy is dominated by oil