arraignment vs legal instrument

arraignment and legal instrument both are nouns.

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

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

arraignment: a legal document calling someone to court to answer an indictment
legal instrument: (law) a document that states some contractual relationship or grants some right

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

arraignment (noun)	legal instrument (noun)
a legal document calling someone to court to answer an indictment	(law) a document that states some contractual relationship or grants some right