industry vs assiduity

industry and assiduity both are nouns.

Word	Noun	Adjective	Verb	Adverb
industry	Yes	No	No	No
assiduity	Yes	No	No	No

As nouns, assiduity is a hyponym of industry; that is, assiduity is a word with a more specific, narrower meaning than industry:

Other hyponyms of industry include assiduousness, concentration, sedulity, sedulousness, studiousness.

industry (noun)	assiduity (noun)
the organized action of making of goods and services for sale	great and constant diligence and attention
persevering determination to perform a task
the people or companies engaged in a particular kind of commercial enterprise