Arduous and Serious

Arduous

Arduous adjective - Requiring considerable physical or mental effort.
Usage example: climbing Mount Everest is an arduous, exhausting challenge

Serious and arduous are semantically related in easy topic. In some cases you can use "Serious" instead an adjective "Arduous".

Nearby Word: arduously

Serious

Serious adjective - Not joking or playful in mood or manner.

Arduous and serious are semantically related in easy topic. Sometimes you can use "Arduous" instead an adjective "Serious", if it concerns topics such as crucial.

Nearby Words: seriously, seriousness
Cite this Source
Serious and Arduous. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/arduous/serious
Arduous & Serious. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/arduous/serious>.
Serious or Arduous. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/arduous/serious.
Google Ngram Viewer shows how "arduous" and "serious" have occurred on timeline