Completely
Completely adverb - To a full extent or degree.
Diligently and completely are semantically related. In some cases you can use "Diligently" instead an adverb "Completely".
Diligently
Diligently adverb - In a manner involving great or constant activity.
Completely and diligently are semantically related. Sometimes you can use "Completely" instead an adverb "Diligently".
Cite this Source
Diligently and Completely. (2016). Retrieved 2026, July 29, from https://thesaurus.plus/related/completely/diligently
Completely & Diligently. N.p., 2016. Web. 29 Jul. 2026. <https://thesaurus.plus/related/completely/diligently>.
Diligently or Completely. 2016. Accessed July 29, 2026. https://thesaurus.plus/related/completely/diligently.
Google Ngram Viewer shows how "completely" and "diligently" have occurred on timeline