Nightmarish definitions

Nightmarish

1) Alarming 2) Appalling 3) Bloodcurdling 4) Frightening 5) Hair raising
Found on https://www.crosswordclues.com/clue/nightmarish

---

Nightmarish

1) Alarming 2) Bloodcurdling 3) Extremely alarming 4) Hair-raising
Found on https://www.crosswordclues.com/clue/nightmarish

---

nightmarish

resembling a nightmare, esp. in being terrifying, exasperating, or the like: his nightmarish experience in a concentration camp.
Found on https://www.infoplease.com/dictionary/nightmarish

---