Assertive
Serious
Serious adjective - Not joking or playful in mood or manner.
Assertive and serious are semantically related. Sometimes you can use "Assertive" instead an adjective "Serious".
Nearby Words: seriously, seriousness
Mutual synonyms
Both words in one sentence
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Things tend to get dramatically serious when the lives of the Dreamlanders are at stake, and Kirby himself changes gears from being just a cute moeblob to the assertive Bad Ass.
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Zii is a promiscuous punk rocker with very masculine traits, while Gary is an Adorkable virgin at least until recently who has serious problems with being assertive.
Source: Masculine Girl, Feminine Boy
Cite this Source
Serious and Assertive. (2016). Retrieved 2026, August 08, from https://thesaurus.plus/related/assertive/serious
Assertive & Serious. N.p., 2016. Web. 08 Aug. 2026. <https://thesaurus.plus/related/assertive/serious>.
Serious or Assertive. 2016. Accessed August 08, 2026. https://thesaurus.plus/related/assertive/serious.
Google Ngram Viewer shows how "assertive" and "serious" have occurred on timeline