executive vs chief

executive and chief both are nouns.

Word	Noun	Adjective	Verb	Adverb
executive	Yes	Yes	No	No
chief	Yes	Yes	No	No

As nouns, chief is a hypernym of executive; that is, chief is a word with a broader meaning than executive:

Other hypernyms of executive include head, top dog.

executive (noun)	chief (noun)
persons who administer the law	a person who is in charge
a person responsible for the administration of a business	a person who exercises control over workers
someone who manages a government agency or department	the head of a tribe or clan

executive (adjective)	chief (adjective)
having the function of carrying out plans or orders etc.	most important element