grammar vs constituent

grammar and constituent both are nouns.

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

grammar (noun)	constituent (noun)
the branch of linguistics that deals with syntax and morphology (and sometimes also deals with semantics)	an artifact that is one of the individual parts of which a composite entity is made up; especially a part that can be separated from or attached to a system
	an abstract part of something
	(grammar) a word or phrase or clause forming part of a larger grammatical construction
	a member of a constituency; a citizen who is represented in a government by officials for whom he or she votes
	something determined in relation to something that includes it

grammar (adjective)	constituent (adjective)
	constitutional in the structure of something (especially your physical makeup)