nonextant vs nonexistent

nonextant and nonexistent both are adjectives.

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

nonextant (adjective)	nonexistent (adjective)
no longer in existence; lost or especially having died out leaving no living representatives	not having existence or being or actuality
no longer existing or inaccessible through loss or destruction