grammar vs objective

grammar and objective both are nouns.

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

grammar (noun)	objective (noun)
the branch of linguistics that deals with syntax and morphology (and sometimes also deals with semantics)	the lens or system of lenses in a telescope or microscope that is nearest the object being viewed
	the goal intended to be attained (and which is believed to be attainable)

grammar (adjective)	objective (adjective)
	undistorted by emotion or personal bias; based on observable phenomena
	serving as or indicating the object of a verb or of certain prepositions and used for certain other purposes
	belonging to immediate experience of actual things or events
	emphasizing or expressing things as perceived without distortion of personal feelings or interpretation