nonessential vs inessential

nonessential and inessential both are nouns.

Word	Noun	Adjective	Verb	Adverb
nonessential	Yes	Yes	No	No
inessential	Yes	Yes	No	No

As nouns, nonessential and inessential are synonyms defined as:

nonessential (noun)	inessential (noun)
anything that is not essential	anything that is not essential

nonessential (adjective)	inessential (adjective)
not of prime or central importance	not basic or fundamental
	not absolutely necessary