Nightmares
Thoughts and nightmares are semantically related. In some cases you can use "Thoughts" instead a noun "Nightmares".
Thoughts
Nightmares and thoughts are semantically related. Sometimes you can use "Nightmares" instead a noun "Thoughts".
Both words in one sentence
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His OCD manifests in constant thoughts and nightmares about heinous crimes he may have committed unintentionally, including murdering his best friend and pedophilia.
Source: Super OCD - Dead or Alive 4: The Devil Factor: Over the course of several chapters, Ayane is repeatedly Mind Raped by a newly resurrected, demonized Raidou, who sends her thoughts and nightmares about the loved ones she's lost to the point where she begins to question her sanity.
Source: Break The Cutie / Fan Works - Mind Rape: Raidou begins to torture Ayane by implanting emotions and thoughts in her mind, and later sending her nightmares.
Cite this Source
Thoughts and Nightmares. (2016). Retrieved 2026, August 09, from https://thesaurus.plus/related/nightmares/thoughts
Nightmares & Thoughts. N.p., 2016. Web. 09 Aug. 2026. <https://thesaurus.plus/related/nightmares/thoughts>.
Thoughts or Nightmares. 2016. Accessed August 09, 2026. https://thesaurus.plus/related/nightmares/thoughts.
Google Ngram Viewer shows how "nightmares" and "thoughts" have occurred on timeline