1
silvery(heather, charcoal, starless)
1
slate(adjective, dark, pitch, black, murky)
1
slater(adjective, dark, pitch, inky, clouded)
1
stoner(heather, charcoal, starless)
1
subfusc
1
subfuscous
1
tartarean
1
unhappy
1
unilluminated
0
cheerless
0
cinereal(heather, charcoal, starless)
0
darksome
0
demoniacal
0
depressing
0
devilish
0
diabolic
0
drear
0
dreary
0
fiendish
0
fiendlike
10 years ago|3.7k views|share |citing 
APASmart Define. (2016). stygian thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/stygian/thesaurus/synonyms
ChicagoSmart Define. 2016. "stygian thesaurus" https://smartdefine.org/stygian/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, stygian thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/stygian/thesaurus/synonyms>.
MLASmart Define. "stygian thesaurus" 29 February 2016. Web. 20 September 2026. <https://smartdefine.org/stygian/thesaurus/synonyms>