realism vs existent

realism is a noun but existent is not a noun.

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

realism (noun)	existent (noun)
the attribute of accepting the facts of life and favoring practicality and literal truth
(philosophy) the philosophical doctrine that physical objects continue to exist when not perceived
(philosophy) the philosophical doctrine that abstract concepts exist independent of their names
an artistic movement in 19th century France; artists and writers strove for detailed realistic and factual description
the state of being actual or real

realism (adjective)	existent (adjective)
	having existence or being or actuality
	being or occurring in fact or actuality; having verified existence; not illusory
	presently existing in fact and not merely potential or possible