Subnormal means “below normal, below average, below the expected.” Abnormal means simply “different from the norm, the average, the expected”; the abnormal may be either above or below the normal. Supernormal means “above or beyond the normal,” although there is also a slang meaning “more normal than normal—matchlessly normal,” a dubious bit of hyperbole. Paranormal refers to psychic phenomena outside or beyond the normal or natural.
