worldling vs worker

worldling and worker both are nouns.

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

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

worldling: a person absorbed by the concerns and interests and pleasures of the present world
worker: a person who acts and gets things done

Other hypernyms of worldling include actor, doer.

worldling (noun)	worker (noun)
a person absorbed by the concerns and interests and pleasures of the present world	sterile member of a colony of social insects that forages for food and cares for the larvae
an inhabitant of the earth	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