legal instrument vs papers

legal instrument and papers both are nouns.

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

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

legal instrument: (law) a document that states some contractual relationship or grants some right
papers: writing that provides information (especially information of an official nature)

Other hypernyms of legal instrument include document, written document.

legal instrument (noun)	papers (noun)
(law) a document that states some contractual relationship or grants some right	writing that provides information (especially information of an official nature)