Superpower was a term used for the abilities demonstrated by superheroes.
Having ingested the Hazandra as a child, Grant gained superpowers and became the superhero known as "the Ghost." Among his powers were flying, super strength, and x-ray vision. (TV: The Return of Doctor Mysterio)
Lucie Miller once told the Eighth Doctor that sarcasm was her superpower. "I am Sarcasmo, woman of sarcasm. My enemies are struck down by my barbs of steel. [...] Barbs. Barbed comments?" (AUDIO: Human Resources)