At it
Assiduous
Assiduous adjective - Involved in often constant activity.
At it and assiduous are semantically related. Sometimes you can use "At it" instead an adjective "Assiduous".
Nearby Words: assiduity, assiduousness
Mutual synonyms
Cite this Source
Assiduous and At it. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/at_it/assiduous
At it & Assiduous. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/at_it/assiduous>.
Assiduous or At it. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/at_it/assiduous.
Google Ngram Viewer shows how "at it" and "assiduous" have occurred on timeline