Laborious
Laborious adjective - Involved in often constant activity.
Threatening and laborious are semantically related. In some cases you can use "Threatening" instead an adjective "Laborious".
Threatening
Threatening adjective - Giving signs of immediate occurrence.
Laborious and threatening are semantically related. Sometimes you can use "Laborious" instead an adjective "Threatening".
Mutual synonyms
Cite this Source
Threatening and Laborious. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/laborious/threatening
Laborious & Threatening. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/laborious/threatening>.
Threatening or Laborious. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/laborious/threatening.
Google Ngram Viewer shows how "laborious" and "threatening" have occurred on timeline