Synonyms for Stygian:

• adj.

  •all (adjective)
  • stygian.
  •black (adjective)
  • obsidian,
  • dusky,
  • melanoid,
  • sable,
  • starless,
  • dingy,
  • inklike,
  • livid,
  • Atramentous,
  • jet,
  • swarthy,
  • charcoal,
  • shadowy,
  • sombrer,
  • somber,
  • slate,
  • sloe,
  • Piceous,
  • coal,
  • raven,
  • pitch,
  • sooty,
  • swart,
  • pitchy,
  • slater,
  • ebony,
  • clouded,
  • onyx,
  • coaler,
  • brunet,
  • ebon,
  • pitch dark,
  • sombre,
  • pitch-black,
  • murky,
  • pitch-dark.
  •dark (adjective)
  • dusk,
  • crepuscular,
  • tenebrous,
  • indistinct,
  • overcast,
  • cloudy,
  • unlighted,
  • dull,
  • shady,
  • drab,
  • shaded,
  • blackish,
  • inky,
  • unlit,
  • nebulous,
  • lightless,
  • misty,
  • sunless,
  • cimmerian,
  • grimy,
  • foggy,
  • opaque,
  • rayless,
  • vague,
  • lurid,
  • dim,
  • caliginous,
  • faint,
  • fainter,
  • aphotic,
  • darkened,
  • ill-lighted,
  • obscure,
  • obfuscous,
  • dun,
  • gloomy.
  •onyx (adjective)
  • jetty.

• n.

  •
  • awesome,
  • frightening,
  • alarming,
  • scary,
  • intimidating,
  • ghastly,
  • eerie,
  • menacing,
  • chilling,
  • spooky.
  •Stygian (noun)
  • acheronian,
  • infernal.
  •infernal (noun)
  • dismal,
  • dreary.

• Other synonyms:

  •Acherontic
  • acherontic.
  •
  • hellish.
  •Other relevant words:
  • subfusc,
  • joyless,
  • moonless,
  • Subfuscous,
  • grey,
  • cheerless,
  • unilluminated,
  • darkling,
  • jet-black,
  • pitch black,
  • drear,
  • Darksome,
  • tartarean,
  • ill-lit,
  • unhappy,
  • grim,
  • coal-black,
  • funereal,
  • depressing.

Antonyms for Stygian:

• adj.

  • black
    happy, hopeful, white, good, clean, optimistic.
  • dark
    smart, brilliant, illuminated, bright, shining, joyful, evident, intelligent, encouraging, radiant, manifest, plain, clear, cheerful, sunny, sparkling, luminous, distinct, light, moral, lucid, visible, vivid, pleased, vivacious, apparent.