noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The state or condition of being nightmarish. uncountable
2. 2
   The property of being extremely bad, miserable, difficult or terrifying; resembling a nightmare. wordnet

Synonyms

All synonyms

hellishness

Etymology

From nightmarish + -ness.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.