professional person vs worker

professional person and worker both are nouns.

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

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

Other hypernyms of professional person include actor, doer.

professional person (noun)	worker (noun)
a person engaged in one of the learned professions	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