important person vs worker

important person and worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
important person	Yes	No	No	No
worker	Yes	No	No	No

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

important person: a person whose actions and opinions strongly influence the course of events
worker: a person who acts and gets things done

Other hypernyms of important person include actor, doer.

important person (noun)	worker (noun)
a person whose actions and opinions strongly influence the course of events	sterile member of a colony of social insects that forages for food and cares for the larvae
	a person who works at a specific occupation
	a member of the working class (not necessarily employed)
	a person who acts and gets things done