preexisting vs preexistent

preexisting and preexistent both are adjectives.

Word	Noun	Adjective	Verb	Adverb
preexisting	No	Yes	No	No
preexistent	No	Yes	No	No

As adjectives, preexisting and preexistent are synonyms defined as:

Other synonyms of preexisting include pre-existent, pre-existing.

preexisting (adjective)	preexistent (adjective)
existing previously or before something	existing previously or before something