A specific use to which something is put:
Steady attention and effort, as to one's occupation
Diligence is defined as determination and careful effort.
Strength or density, as of a solution
A standardized tradition of toolmaking associated with a specified tool or culture:
Find another word for assiduity. In this page you can discover 14 synonyms, antonyms, idiomatic expressions, and related words for assiduity, like: application, industrious, earnestness, diligence, sagacity, assiduousness, concentration, painstakingness, industriousness, industry and sedulousness.