otherworldly

As a noun netherworld

is the place to which one's spirit descends upon death, conceived as below the surface of the earth.

As an adjective 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.

As adjectives the difference between otherworldly and magical

is that 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 while magical is of or relating to magic.

As an adjective 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.

As a proper noun magic is

the decrypted japanese messages produced by us cryptographers in and prior to world war ii.

As adjectives the difference between extraterrestrial and otherworldly

is that extraterrestrial is originating from outside of the earth's atmosphere, from space, or from another planet; alien to earth or its environment 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.

As a noun extraterrestrial

is a being originating from outside of the earth's atmosphere, from space, or from another planet; an alien.

As adjectives the difference between otherworldly and undefined

is that 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 while undefined is lacking a definition or value.

As adjectives the difference between otherworldly and extraordinary

is that 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 while extraordinary is not ordinary; exceptional; unusual;.