deed vs legal instrument

deed and legal instrument both are nouns.

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

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

deed: a legal document signed and sealed and delivered to effect a transfer of property and to show the legal right to possess it
legal instrument: (law) a document that states some contractual relationship or grants some right

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

deed (noun)	legal instrument (noun)
something that people do or cause to happen	(law) a document that states some contractual relationship or grants some right
a legal document signed and sealed and delivered to effect a transfer of property and to show the legal right to possess it