Yes, "frightening" can be considered a mood word as it conveys a specific emotional atmosphere or feeling. It evokes a sense of fear or anxiety, influencing how one perceives a situation or environment. In literature and art, it can set the tone and enhance the emotional impact of a piece.
mysterious, frightening, scary....
It will bring about a frightening change in mood and behavior.
That movie was frightening .
more frightening
Yes, the word 'nightmare' is a noun, a word for a frightening dream; a frightening or horrible experience; a word for a thing.
The unstressed vowel in the word "frightening" is the letter "i" in the second syllable "-ten-".
frightening
Frightening
Vampire is a seven letter word that describes a frightening Halloween creature.
The prospect of spending the night in the haunted house was absolutely frightening. Walking in the woods can be frightening if you are alone.
I think you are asking what the word 'atmosphere' means when used in connnection with a story, play or film. Its just another word for the mood of the story. The mood can be pleasant, amusing, frightening, cruel, despairing or whatever depending on what type of story it is and what emotions the author is trying to arouse in you.
If you mean the word "mood" then it has only one syllable.