Serious
Serious adjective - Not joking or playful in mood or manner.
True and serious are semantically related. In some cases you can use "True" instead an adjective "Serious".
Nearby Words: seriously, seriousness
True
True adjective - Firm in one's allegiance to someone or something.
Usage example: he will be true to his word
Both words in one sentence
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Except right after he said that, he immediately negated it by confessing that what he said was true and serious.
Source: Evil Has a Bad Sense of Humor -
She chooses good each time, but not without some serious soul searching on what she believes to be a Templar's true duty.
Source: Literature / Asunder -
This is technically true, since he and Carmen went on a few dates, nothing serious, and she always begins her (occasional) letters with "Dear John".
Source: "Dear John" Letter
Cite this Source
True and Serious. (2016). Retrieved 2026, July 29, from https://thesaurus.plus/related/serious/true
Serious & True. N.p., 2016. Web. 29 Jul. 2026. <https://thesaurus.plus/related/serious/true>.
True or Serious. 2016. Accessed July 29, 2026. https://thesaurus.plus/related/serious/true.
Google Ngram Viewer shows how "serious" and "true" have occurred on timeline