precursor vs worker

precursor and worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
precursor	Yes	No	No	No
worker	Yes	No	No	No

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

Other hypernyms of precursor include actor, doer.

precursor (noun)	worker (noun)
something that precedes and indicates the approach of something or someone	sterile member of a colony of social insects that forages for food and cares for the larvae
a person who goes before or announces the coming of another	a person who works at a specific occupation
a substance from which another substance is formed (especially by a metabolic reaction)	a member of the working class (not necessarily employed)
	a person who acts and gets things done