contestant vs worker

contestant and worker both are nouns.

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

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

Other hypernyms of contestant include actor, doer.

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

Other hypernyms of contestant include actor, doer.

contestant (noun)	worker (noun)
a person who participates in competitions	sterile member of a colony of social insects that forages for food and cares for the larvae
a person who dissents from some established policy	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