historical document vs historical paper

historical document and historical paper both are nouns.

Word	Noun	Adjective	Verb	Adverb
historical document	Yes	No	No	No
historical paper	Yes	No	No	No

As nouns, historical document and historical paper are synonyms defined as:

historical document and historical paper: writing having historical value (as opposed to fiction or myth etc.)

Other synonyms of historical document include historical record.

historical document (noun)	historical paper (noun)
writing having historical value (as opposed to fiction or myth etc.)	writing having historical value (as opposed to fiction or myth etc.)