theoretically

As a noun practical

is (british) a part of an exam or series of exams in which the candidate has to demonstrate their practical ability.

As an adjective practical

is based on practice or action rather than theory or hypothesis.

As an adverb theoretically is

in theory; on paper.

As an adverb theoretically

is in theory; on paper.

As an adjective undefined is

lacking a definition or value.

As adverbs the difference between theoretically and potentially

is that theoretically is in theory; on paper while potentially is in a manner showing much potential; with the possibility of happening in a given way.

As adverbs the difference between theoretically and supposedly

is that theoretically is in theory; on paper while supposedly is as a matter of supposition; in the beliefs or according to the claims of some people.

As adverbs the difference between logically and theoretically

is that logically is in a logical manner, with logic while theoretically is in theory; on paper.

As adverbs the difference between theoretically and teleologically

is that theoretically is in theory; on paper while teleologically is in a teleological context or manner.

As adverbs the difference between practically and theoretically

is that practically is in practice; in effect. Not necessarily officially the case but what actually occurs while theoretically is in theory; on paper.

As adverbs the difference between empirically and theoretically

is that empirically is based on experience as opposed to theoretical knowledge while theoretically is in theory; on paper.

As adverbs the difference between theoretically and perfectly

is that theoretically is in theory; on paper while perfectly is with perfection.