Synonyms of obsidian

1 Syllable
black, jet, dark, sloe
2 Syllables
jeter, ebon, midnight, jetting, blackest, slater, charcoal, basalt, raven, onyx, piceous, pitch-dark, stygian, coal-black, inky, pitch-black, blacker, starless, sable, pitchy
3 Syllables
ebony, inklike, melanoid, coaler
4 Syllables
atramentous, bituminous