existest

As a noun terms

is .

As a verb existest is

(archaic) (exist).

In archaic terms the difference between existent and existest

is that existent is a being or entity that exists independently while existest is archaic second-person singular of exist.

As an adjective existent

is existing; having life or being, current; occurring now.

As a noun existent

is a being or entity that exists independently.

As a verb existest is

archaic second-person singular of exist.