capturer vs doer

capturer and doer both are nouns.

Word	Noun	Adjective	Verb	Adverb
capturer	Yes	No	No	No
doer	Yes	No	No	No

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

Other hypernyms of capturer include actor, worker.

capturer (noun)	doer (noun)
a person who captures and holds people or animals	a person who acts and gets things done