existent vs documentary

existent is not a noun while documentary is a noun.

Word	Noun	Adjective	Verb	Adverb
existent	No	Yes	No	No
documentary	Yes	Yes	No	No

existent (noun)	documentary (noun)
	a film or TV program presenting the facts about a person or event

existent (adjective)	documentary (adjective)
having existence or being or actuality	relating to or consisting of or derived from documents
being or occurring in fact or actuality; having verified existence; not illusory	(of film, television, radio, or photography) depicting a real-life event using images or interviews with people involved in the event
presently existing in fact and not merely potential or possible