arcanum vs parole

arcanum and parole both are nouns.

Word	Noun	Adjective	Verb	Adverb
arcanum	Yes	No	No	No
parole	Yes	No	Yes	No

As nouns, parole is a hyponym of arcanum; that is, parole is a word with a more specific, narrower meaning than arcanum:

arcanum (noun)	parole (noun)
information known only to a special group	(law) a conditional release from imprisonment that entitles the person to serve the remainder of the sentence outside the prison as long as the terms of release are complied with
	a promise
	a secret word or phrase known only to a restricted group

arcanum (verb)	parole (verb)
	release a criminal from detention and place him on parole