abyss
1. [ noun ] a bottomless gulf or pit; any unfathomable (or apparently unfathomable) cavity or chasm or void extending below (often used figuratively)
Synonyms: abysm
Related terms: chasm
Similar spelling:   ABCs
  Abbs
  abuse
  Abies
  ABC's
  Abbas
  abash
  abase
  abbess
  abasia
  ABC
  abbacy