historical vs existent

historical and existent both are adjectives.

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

historical (adjective)	existent (adjective)
used of the study of a phenomenon (especially language) as it changes through time	having existence or being or actuality
of or relating to the study of history	being or occurring in fact or actuality; having verified existence; not illusory
belonging to the past; of what is important or famous in the past	presently existing in fact and not merely potential or possible
having once lived or existed or taken place in the real world as distinct from being legendary