Synonyms and related words :
beamless, black, black as night, caliginous, dark, dark as night, dark as pitch, darkling, darksome, ebon, ebony, eclipsed, night-black, night-clad, night-cloaked, night-dark, night-enshrouded, night-filled, night-mantled, night-veiled, obfuscated, obscure, obscured, occulted, pitch-black, pitch-dark, pitchy, rayless, starless, sunless, tenebrious, tenebrose, tenebrous, unilluminated, unlighted