ex-spouse vs worker

ex-spouse and worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
ex-spouse	Yes	No	No	No
worker	Yes	No	No	No

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

Other hypernyms of ex-spouse include actor, doer.

ex-spouse (noun)	worker (noun)
a person who was formerly a spouse	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