ex-spouse vs doer

ex-spouse and doer both are nouns.

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

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

Other hypernyms of ex-spouse include actor, worker.

ex-spouse (noun)	doer (noun)
a person who was formerly a spouse	a person who acts and gets things done