tribal sheikh vs tribal sheik

tribal sheikh and tribal sheik both are nouns.

Word	Noun	Adjective	Verb	Adverb
tribal sheikh	Yes	No	No	No
tribal sheik	Yes	No	No	No

As nouns, tribal sheikh and tribal sheik are synonyms defined as:

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

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