grammar vs nominal

grammar and nominal both are nouns.

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

grammar (noun)	nominal (noun)
the branch of linguistics that deals with syntax and morphology (and sometimes also deals with semantics)	a phrase that can function as the subject or object of a verb

grammar (adjective)	nominal (adjective)
	of, relating to, or characteristic of an amount that is not adjusted for inflation
	pertaining to a noun or to a word group that functions as a noun
	relating to or constituting or bearing or giving a name
	existing in name only
	insignificantly small; a matter of form only (`tokenish' is informal)
	named; bearing the name of a specific person