What is a group of Nightmares called?

A group of nightmares is commonly called a Horde. Other collective nouns you may see include Plague and Ambush.

Collective nouns are a fascinating part of the English language. They are used to describe a group of individuals or things, often bringing together distinct elements under one shared term. When it comes to nightmares, a type of intense and distressing dream typically experienced during sleep, the concept of a collective noun may evoke a sense of collective dread and foreboding. One possible collective noun phrase that could describe nightmares, is "a labyrinth of nightmares." This carefully chosen term captures the intricate and convoluted nature of these distressing dreams. Nightmares are known for their ability to transport the dreamer into terrifying scenarios, often leading them down twisted paths and inducing a tangled cycle of fear. Another collective noun option could be "a torment of nightmares." This wording highlights the tormenting aspect of these haunting dreams. Just as a group of crows is called a "murder," the noun "torment" encapsulates the emotional and psychological distress commonly associated with nightmares. Alternatively, one may opt for "a specter of nightmares." By linking the idea of sleep torment to the haunting presence of apparitions or ghosts (such as specters), this collective noun emphasizes the spine-tingling and ghostly sensations that often accompany nightmares. Lastly, envisioning nightmares as "a storm of nightmares" may capture their impactful and tumultuous nature. The term "storm" conveys a sense of chaos, turbulent emotions, and darkness that nightmares can evoke. It suggests that these dreams can sweep through one's sleep with an intense and overwhelming force. In conclusion, collective nouns offer an intriguing way to capture the essence and shared experience of nightmares. Whether it be a labyrinth, a torment, a specter, or a storm, their descriptive power successfully encapsulates the unsettling and distressing world that nightmares immerse us in.