Nouns

(n)dark, darknessabsence of light or illumination
(n)darkness, dark, shadowan unilluminated area“he moved off into the darkness”
(n)wickedness, darkness, darkabsence of moral or spiritual values“the powers of darkness”
(n)dark, darknessan unenlightened state“he was in the dark concerning their intentions”, “his lectures dispelled the darkness”
(n)darknesshaving a dark or somber color
(n)darkness, duskiness, swarthinessa swarthy complexion