Hallucination
Hallucination noun - A conception or image created by the imagination and having no objective reality.
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Synonyms for Hallucination
Nightmares and hallucination are semantically related In some cases you can replace term "Nightmares" with "Hallucination", this nouns are similar.
Nightmares
Hallucination and nightmares are semantically related in bad dream or experience topic. You can use "Hallucination" instead a noun "Nightmares".
Both words in one sentence
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Terminator: The Sarah Connor Chronicles had a surreal, cyborg-free episode where Sarah is in a sleep clinic and is haunted by nightmares which are actually real, while the clinic is a hallucination caused by a one-off villain probing her mind.
Source: Bizarro Episode - Freak Out: Due to the events in the original timeline, Luffy often has nightmares and panic attacks related to the fates of his friends and being unable to save them, it's bad enough that his original hallucination of Crocodile is replaced by Sakazuki.
Cite this Source
Nightmares and Hallucination. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/hallucination/nightmares
Hallucination & Nightmares. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/hallucination/nightmares>.
Nightmares or Hallucination. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/hallucination/nightmares.
Google Ngram Viewer shows how "hallucination" and "nightmares" have occurred on timeline