Nightmare
Nightmare noun - A situation or state that causes great suffering and unhappiness.
Rainbow and nightmare are semantically related. In some cases you can use "Rainbow" instead a noun "Nightmare".
Nearby Word: nightmarish
Rainbow
Rainbow noun - An arc of colored light in the sky caused by refraction of the sun's rays by rain.
Mutual synonyms
Both words in one sentence
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Erotic Dream: Happens to Brownie until it suddenly turns into a nightmare and Rainbow Dash when she takes care of Brownie after he falls ill.
Source: Fan Fic / Rainbow in the Dark -
Rainbow Dash is already fighting Changelings in her dream, so what's her nightmare?
Source: Faux Horrific -
Nightmare Sequence: The setting of the first two games; the third was stated to be something Rainbow Dash was actually experiencing.
Source: Video Game / Dreamy Rainbow
Cite this Source
Rainbow and Nightmare. (2016). Retrieved 2026, August 07, from https://thesaurus.plus/related/nightmare/rainbow
Nightmare & Rainbow. N.p., 2016. Web. 07 Aug. 2026. <https://thesaurus.plus/related/nightmare/rainbow>.
Rainbow or Nightmare. 2016. Accessed August 07, 2026. https://thesaurus.plus/related/nightmare/rainbow.
Google Ngram Viewer shows how "nightmare" and "rainbow" have occurred on timeline