nominal vs grammar

nominal and grammar both are nouns.

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

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

nominal (adjective)	grammar (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