article vs document

article and document both are nouns.

Word	Noun	Adjective	Verb	Adverb
article	Yes	No	Yes	No
document	Yes	No	Yes	No

article (noun)	document (noun)
one of a class of artifacts	anything serving as a representation of a person's thinking by means of symbolic marks
nonfictional prose forming an independent part of a publication	writing that provides information (especially information of an official nature)
(grammar) a determiner that may indicate the specificity of reference of a noun phrase	(computer science) a computer file that contains text (and possibly formatting instructions) using seven-bit ASCII characters
a separate section of a legal document (as a statute or contract or will)	a written account of ownership or obligation

article (verb)	document (verb)
bind by a contract; especially for a training period	support or supply with references
	record in detail