supernumerary vs worker

supernumerary and worker both are nouns.

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

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

Other hypernyms of supernumerary include actor, doer.

supernumerary (noun)	worker (noun)
a minor actor in crowd scenes	sterile member of a colony of social insects that forages for food and cares for the larvae
a person serving no apparent function	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

supernumerary (adjective)	worker (adjective)
more than is needed, desired, or required