Blacken
Blacken verb - To make dirty.
Cloud over is a synonym for blacken in grow dark topic. In some cases you can use "Cloud over" instead a verb "Blacken", when it comes to topics like become black.
Cloud over
Cloud over verb - Become overcast.
Blacken is a synonym for cloud over in unlit topic. You can use "Blacken" instead a verb "Cloud over", if it concerns topics such as grow dark, shut out the light.
Mutual synonyms
Cite this Source
Cloud over and Blacken. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/blacken/cloud_over
Blacken & Cloud over. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/blacken/cloud_over>.
Cloud over or Blacken. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/blacken/cloud_over.
Google Ngram Viewer shows how "blacken" and "cloud over" have occurred on timeline