tribal sheik vs Arab chief

tribal sheik and Arab chief both are nouns.

Word	Noun	Adjective	Verb	Adverb
tribal sheik	Yes	No	No	No
Arab chief	Yes	No	No	No

As nouns, tribal sheik and Arab chief are synonyms defined as:

Other synonyms of tribal sheik include sheik, sheikh, tribal sheikh.

tribal sheik (noun)	Arab chief (noun)
the leader of an Arab village or family	the leader of an Arab village or family