sheikh vs Arab chief

sheikh and Arab chief both are nouns.

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

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

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

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