2 Words to use with blackness

Where blackness bides unbroke, must devils be? Is it so certain, not another cell O' the myriad that make up the catacomb, Contains some saint a second flash would show? Will you ascend into the light of day And, having recognised a martyr's shrine, Go join the votaries that gape around Each vulgar god that awes the market-place?" (iv. 219).

As I did so a yell reached my ears from the blackness belowthe hounds had found voice.

2 Words to use with  blackness