Source -Google

Who’s Stronger: Black Adam or Shazam?

We still don't have an explanation from the DCEU, but we do from the comic books.

IMAGE SOURCE -Iig

The same abilities that belonged to Hercules, Atlas, Solomon, and Zeus were all present in Black Adam.

IMAGE SOURCE -Iig

The word Teth-Adam and Billy require to acquire their powers or give them away is "S.H.A.Z.A.M.," which is the name of the heroes and gods that spell it.

IMAGE SOURCE -Iig

Black Adam clearly had the upper hand.

IMAGE SOURCE -Iig

Black Adam's powers only grew in later comic book renditions.

IMAGE SOURCE -Iig

Although Black Adam ought to be Shazam's equal, some of his skills are beyond Billy Batson's grasp.

IMAGE SOURCE -Iig

Black Adam can only be defeated by Shazam by using his inventiveness from childhood to dupe the antihero into saying the secret phrase that will restore his powers.

IMAGE SOURCE -Iig