grammar vs article

grammar and article both are nouns.

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

grammar (noun)	article (noun)
the branch of linguistics that deals with syntax and morphology (and sometimes also deals with semantics)	one of a class of artifacts
	nonfictional prose forming an independent part of a publication
	(grammar) a determiner that may indicate the specificity of reference of a noun phrase
	a separate section of a legal document (as a statute or contract or will)

grammar (verb)	article (verb)
	bind by a contract; especially for a training period