destiny vs causal agent

destiny and causal agent both are nouns.

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

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

destiny: the ultimate agency regarded as predetermining the course of events
causal agent: any entity that produces an effect or is responsible for events or results

Other hypernyms of destiny include causal agency, cause.

destiny (noun)	causal agent (noun)
an event (or a course of events) that will inevitably happen in the future	any entity that produces an effect or is responsible for events or results
the ultimate agency regarded as predetermining the course of events
your overall circumstances or condition in life (including everything that happens to you)