catalyst vs causal agent

catalyst and causal agent both are nouns.

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

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

catalyst: something that causes an important event to happen
causal agent: any entity that produces an effect or is responsible for events or results

Other hypernyms of catalyst include causal agency, cause.

catalyst (noun)	causal agent (noun)
something that causes an important event to happen	any entity that produces an effect or is responsible for events or results
(chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected