acquittal vs final decision

acquittal and final decision both are nouns.

Word	Noun	Adjective	Verb	Adverb
acquittal	Yes	No	No	No
final decision	Yes	No	No	No

As nouns, final decision is a hypernym of acquittal; that is, final decision is a word with a broader meaning than acquittal:

acquittal: a judgment of not guilty
final decision: a judgment disposing of the case before the court; after the judgment (or an appeal from it) is rendered all that remains is to enforce the judgment

Other hypernyms of acquittal include final judgment.

acquittal (noun)	final decision (noun)
a judgment of not guilty	a judgment disposing of the case before the court; after the judgment (or an appeal from it) is rendered all that remains is to enforce the judgment