kingmaker vs influential person

kingmaker and influential person both are nouns.

Word	Noun	Adjective	Verb	Adverb
kingmaker	Yes	No	No	No
influential person	Yes	No	No	No

As nouns, influential person is a hypernym of kingmaker; that is, influential person is a word with a broader meaning than kingmaker:

kingmaker: an important person who can bring leaders to power through the exercise of political influence
influential person: a person whose actions and opinions strongly influence the course of events

Other hypernyms of kingmaker include important person, personage.

kingmaker (noun)	influential person (noun)
an important person who can bring leaders to power through the exercise of political influence	a person whose actions and opinions strongly influence the course of events