Which word is wrongly spelled in the following? knigtmere, scary, blackout, haunted

Which word is wrongly spelled in the following? knigtmere, scary, blackout, haunted

مندرجہ ذیل میں کون سا لفظ غلط لکھا گیا ہے؟\ knigtmere, scary, blackout, haunted
Explanation

Knigtmere incorrect 

Nightmare correct

Nightmare means ڈراؤنا خواب 

ND23-4-2023