Honest
Honest adjective - Being in the habit of telling the truth.
Usage example: at least the weatherman is honest and doesn't pretend to be able to predict the unpredictable
Plain is a synonym for honest in speech topic. In some cases you can use "Plain" instead an adjective "Honest", when it comes to topics like natural, genuine, open, candid.
Plain
Plain adjective - Free from all additions or embellishment.
Usage example: just give us the plain facts and none of your snide comments
Honest is a synonym for plain in candid topic. You can use "Honest" instead an adjective "Plain", if it concerns topics such as behaviour, natural, genuine, straightforward.
Mutual synonyms
Both words in one sentence
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In Black God, a side-story shows that Namu used to work as a fortune-teller and didn't make much money off of it as she didn't see anything wrong with giving the plain and honest truth.
Source: Brutal Honesty -
When Rei started to pursue Shinji, though, she had no option but dropping her façade and displaying her feelings and her nicer side in plain, honest fashion.
Source: Fanfic / The One I Love Is -
First, recognize honest intent, whether expressed as the plain truth or a technical falsehood.
Source: Truth and Lies
Cite this Source
Plain and Honest. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/honest/plain
Honest & Plain. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/honest/plain>.
Plain or Honest. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/honest/plain.
Google Ngram Viewer shows how "honest" and "plain" have occurred on timeline