legal document vs official document

legal document and official document both are nouns.

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

As nouns, legal document and official document are synonyms defined as:

legal document and official document: (law) a document that states some contractual relationship or grants some right

Other synonyms of legal document include instrument, legal instrument.

legal document (noun)	official document (noun)
(law) a document that states some contractual relationship or grants some right	(law) a document that states some contractual relationship or grants some right