ruler vs worker

ruler and worker both are nouns.

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

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

Other hypernyms of ruler include actor, doer.

ruler (noun)	worker (noun)
measuring stick consisting of a strip of wood or metal or plastic with a straight edge that is used for drawing straight lines and measuring lengths	sterile member of a colony of social insects that forages for food and cares for the larvae
a person who rules or commands	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