Constantly
Constantly adverb - Many times.
Diligently and constantly are semantically related. In some cases you can use "Diligently" instead an adverb "Constantly".
Diligently
Diligently adverb - In a manner involving great or constant activity.
Constantly and diligently are semantically related. Sometimes you can use "Constantly" instead an adverb "Diligently".
Both words in one sentence
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This being the Imperium, the workers have used the method diligently and the military officer's initial surprise at hearing such dangerous tactics being constantly employed quickly goes to him internally being awed by the workers' courage and determination.
Source: Suicide Attack -
Galadriel is not only constantly watching over Middle-Earth - diligently noticing even small things - but she cares about the fate of Middle-Earth and the creatures in it, having the perspective, wisdom and power to guide its destiny in the right direction.
Cite this Source
Diligently and Constantly. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/constantly/diligently
Constantly & Diligently. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/constantly/diligently>.
Diligently or Constantly. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/constantly/diligently.
Google Ngram Viewer shows how "constantly" and "diligently" have occurred on timeline