mandate vs legal document

mandate and legal document both are nouns.

Word	Noun	Adjective	Verb	Adverb
mandate	Yes	No	Yes	No
legal document	Yes	No	No	No

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

mandate: a document giving an official instruction or command
legal document: (law) a document that states some contractual relationship or grants some right

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

mandate (noun)	legal document (noun)
the commission that is given to a government and its policies through an electoral victory	(law) a document that states some contractual relationship or grants some right
a document giving an official instruction or command
a territory surrendered by Turkey or Germany after World War I and put under the tutelage of some other European power until they are able to stand by themselves