insider vs corporate executive

insider and corporate executive both are nouns.

Word	Noun	Adjective	Verb	Adverb
insider	Yes	No	No	No
corporate executive	Yes	No	No	No

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

insider: an officer of a corporation or others who have access to private information about the corporation's operations
corporate executive: an executive in a business corporation

Other hypernyms of insider include business executive.

insider (noun)	corporate executive (noun)
an officer of a corporation or others who have access to private information about the corporation's operations	an executive in a business corporation