preexistent vs preexisting

preexistent and preexisting both are adjectives.

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

As adjectives, preexistent and preexisting are synonyms defined as:

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

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