Idea
Idea noun - Something imagined or pictured in the mind.
Reason why and idea are semantically related. In some cases you can replace phrase "Reason why" with "Idea", this terms are similar.
Reason why
Idea and reason why are semantically related. Sometimes you can replace term "Idea" with "Reason why", this terms are similar.
Mutual synonyms
Both terms in one sentence
-
Either way, though, they both serve the same purpose as tropes: to provide an unambiguous in-universe reason why trying to change the past is a very bad idea.
Source: Time Police -
It's the reason why he promotes the idea that things translated from mirrors are created by Imagers, and don't have any prior existence.
-
Parental Abandonment: Kahrun's backstory, and the reason why he has no idea of his parentage.
Source: Video Game / Aion
Cite this Source
Reason why and Idea. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/idea/reason_why
Idea & Reason why. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/idea/reason_why>.
Reason why or Idea. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/idea/reason_why.
Google Ngram Viewer shows how "idea" and "reason why" have occurred on timeline