abstruse

Unaccountable is a related term of abstruse.

As adjectives the difference between unaccountable and abstruse

is that unaccountable is inexplicable; unable to account for, or explain while abstruse is (obsolete) concealed or hidden out of the way; secret .

Unexplainable is a related term of abstruse.

As adjectives the difference between unexplainable and abstruse

is that unexplainable is that cannot be explained; inexplicable while abstruse is (obsolete) concealed or hidden out of the way; secret .

Abstruse is a related term of intellectual.

As adjectives the difference between abstruse and intellectual

is that abstruse is (obsolete) concealed or hidden out of the way; secret while intellectual is belonging to, or performed by, the intellect; mental or cognitive; as, intellectual powers, activities, etc.

As a noun intellectual is

an intelligent, learned person, especially one who discourses about learned matters.

As adjectives the difference between abstruse and otherworldly

is that abstruse is concealed or hidden out of the way; secret while otherworldly is of, concerned with, or preoccupied with a different world than that of the tangible here and now, such as a heavenly, spiritual, or imaginary world.

Mystical is a synonym of abstruse.

As adjectives the difference between mystical and abstruse

is that mystical is relating to mystics or mysticism while abstruse is (obsolete) concealed or hidden out of the way; secret .

Visionary is a related term of abstruse.

As adjectives the difference between visionary and abstruse

is that visionary is having vision or foresight while abstruse is (obsolete) concealed or hidden out of the way; secret .

As a noun visionary

is someone who has visions; a seer.

Undecipherable is a related term of abstruse.

As adjectives the difference between undecipherable and abstruse

is that undecipherable is not easily deciphered; difficult to read while abstruse is (obsolete) concealed or hidden out of the way; secret .

Abstruse is a related term of cabalistic.

As adjectives the difference between abstruse and cabalistic

is that abstruse is (obsolete) concealed or hidden out of the way; secret while cabalistic is of or relating to a cabal; secretive and cliquish.

As adjectives the difference between abstruse and enigmatical

is that abstruse is concealed or hidden out of the way; secret while enigmatical is pertaining to an enigma.

Abstruse is a related term of symbolic.

As adjectives the difference between abstruse and symbolic

is that abstruse is (obsolete) concealed or hidden out of the way; secret while symbolic is pertaining to a symbol.