acquittance vs legal instrument

acquittance and legal instrument both are nouns.

Word	Noun	Adjective	Verb	Adverb
acquittance	Yes	No	No	No
legal instrument	Yes	No	No	No

As nouns, legal instrument is a hypernym of acquittance; that is, legal instrument is a word with a broader meaning than acquittance:

acquittance: a legal document evidencing the discharge of a debt or obligation
legal instrument: (law) a document that states some contractual relationship or grants some right

Other hypernyms of acquittance include instrument, legal document, official document.

acquittance (noun)	legal instrument (noun)
a legal document evidencing the discharge of a debt or obligation	(law) a document that states some contractual relationship or grants some right