Halloween Puzzle

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Across
  1. 2. Relating to a building or vault where corpses or bones are deposited (7)
  2. 3. A mass for the repose of the souls of the dead (7)
  3. 4. A fictional cosmic entity created by H.P. Lovecraft, often associated with horror (8)
  4. 8. A harsh, discordant mixture of sounds (9)
  5. 9. A ghost or ghostlike image of someone, especially one seen shortly before or after their death (6)
  6. 11. Disturbing and horrifying because of the involvement of death and injury (7)
  7. 13. A sequence of real or imaginary images like those seen in a dream (13)
  8. 15. Dark, shadowy, or obscure (10)
  9. 16. A musical composition that is inspired by or evocative of the night (8)
  10. 17. To soften or break down (food or tissue) by soaking in liquid (8)
  11. 18. An underground cemetery with tunnels and rooms (8)
Down
  1. 1. Having or showing a wish to do evil to others (9)
  2. 5. To honor as holy or sacred (6)
  3. 6. A wailing spirit in Irish folklore believed to foretell death (7)
  4. 7. Relating to a style of architecture characterized by pointed arches and elaborate designs, or to literature with dark themes (6)
  5. 10. - An intense fear of death or dying (15)
  6. 12. A deep or seemingly bottomless chasm (5)
  7. 14. Intended for or likely to be understood by only a small number of people (8)