unloosen vs parole

unloosen is not a noun while parole is a noun.

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

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

Other hyponyms of unloosen include unspell, unchain, bail, run, bail out.

unloosen (noun)	parole (noun)
	(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

unloosen (verb)	parole (verb)
loosen the ties of	release a criminal from detention and place him on parole
grant freedom to; free from confinement