tribal sheikh vs Arab chief

tribal sheikh and Arab chief both are nouns.

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

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

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

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