actor vs causal agent

actor and causal agent both are nouns.

Word	Noun	Adjective	Verb	Adverb
actor	Yes	No	No	No
causal agent	Yes	No	No	No

As nouns, causal agent is a hypernym of actor; that is, causal agent is a word with a broader meaning than actor:

actor: a person who acts and gets things done
causal agent: any entity that produces an effect or is responsible for events or results

Other hypernyms of actor include causal agency, cause.

actor (noun)	causal agent (noun)
a theatrical performer	any entity that produces an effect or is responsible for events or results
a person who acts and gets things done