existency

As a noun existency

is .

As an adjective undefined is

lacking a definition or value.

As nouns the difference between existent and existency

is that existent is a being or entity that exists independently while existency is archaic form of lang=en.

As an adjective existent

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

As nouns the difference between terms and existency

is that terms is while existency is .

As nouns the difference between existence and existency

is that existence is the state of being, existing, or occurring; beinghood while existency is archaic form of lang=en.