nonexistent vs barren

nonexistent is not a noun while barren is a noun.

Word	Noun	Adjective	Verb	Adverb
nonexistent	No	Yes	No	No
barren	Yes	Yes	No	No

nonexistent (noun)	barren (noun)
	an uninhabited wilderness that is worthless for cultivation

nonexistent (adjective)	barren (adjective)
not having existence or being or actuality	providing no shelter or sustenance
	completely wanting or lacking
	not bearing offspring