Usually means: Quality of being intensely frightening, distressing.
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We found 5 dictionaries that define the word nightmarishness:

General (4 matching dictionaries)
  1. nightmarishness: Collins English Dictionary
  2. nightmarishness: Wiktionary
  3. nightmarishness: Dictionary.com
  4. nightmarishness: TheFreeDictionary.com

Medicine (1 matching dictionary)
  1. nightmarishness: Medical dictionary

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Definitions from Wiktionary (nightmarishness)

▸ noun:  The state or condition of being nightmarish.

Similar:
terrifyingness, night fear, monstrousness, fearsomeness, macabreness, benightment, hauntingness, unnervingness, dismalness, hellishness, more...

Opposite:
pleasantness, bliss, happiness, serenity

▸ Words similar to nightmarishness

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▸ Idioms related to nightmarishness

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▸ Popular adjectives describing nightmarishness

▸ Words that often appear near nightmarishness

▸ Rhymes of nightmarishness

▸ Invented words related to nightmarishness

Similar:
terrifyingness, night fear, monstrousness, fearsomeness, macabreness, benightment, hauntingness, unnervingness, dismalness, hellishness, more...

Opposite:
pleasantness, bliss, happiness, serenity



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