baby buster vs worker

baby buster and worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
baby buster	Yes	No	No	No
worker	Yes	No	No	No

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

baby buster: a person born in the generation following the baby boom when the birth rate fell dramatically
worker: a person who acts and gets things done

Other hypernyms of baby buster include actor, doer.

baby buster (noun)	worker (noun)
a person born in the generation following the baby boom when the birth rate fell dramatically	sterile member of a colony of social insects that forages for food and cares for the larvae
	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