opener vs worker

opener and worker both are nouns.

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

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

Other hypernyms of opener include actor, doer.

opener (noun)	worker (noun)
a hand tool used for opening sealed containers (bottles or cans)	sterile member of a colony of social insects that forages for food and cares for the larvae
the first event in a series	a person who works at a specific occupation
a person who unfastens or unwraps or opens	a member of the working class (not necessarily employed)
	a person who acts and gets things done