article vs grammar

article and grammar both are nouns.

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

article (noun)	grammar (noun)
one of a class of artifacts	the branch of linguistics that deals with syntax and morphology (and sometimes also deals with semantics)
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)

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