Idea
Idea noun - Something imagined or pictured in the mind.
Subject is a synonym for idea in significance topic. In some cases you can use "Subject" instead a noun "Idea".
Subject
Subject noun - A major object of interest or concern (as in a discussion or artistic composition).
Usage example: the subject of our discussion switched from who would be the next president to who was the greatest president in the nation's history
Idea is a synonym for subject in significance topic. Sometimes you can use "Idea" instead a noun "Subject", if it concerns topics such as issue.
Mutual synonyms
How words are described
Both words in one sentence
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But when Jack asks whose idea it was to do bizarre short films instead of movies, Mike guiltily looked around before hastily changing the subject.
Source: Web Video / Best of the Worst -
The title refers to the act of doing so, but the main obstacle is that the subject has to believe it's their own idea for it to stick.
Source: You Cannot Kill an Idea -
He is, but the sheer magnitude of her mother's ignorance on the subject completely eclipses anything else about it, and Precious moves on without giving the idea any further thought.
Source: Literature / Push
Cite this Source
Subject and Idea. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/idea/subject
Idea & Subject. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/idea/subject>.
Subject or Idea. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/idea/subject.
Google Ngram Viewer shows how "idea" and "subject" have occurred on timeline