Arab chief vs sheikh

Arab chief and sheikh both are nouns.

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

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

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

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