nonexistent vs extinct

nonexistent and extinct both are adjectives.

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

nonexistent (adjective)	extinct (adjective)
not having existence or being or actuality	no longer in existence; lost or especially having died out leaving no living representatives
	(of e.g. volcanoes) permanently inactive
	being out or having grown cold