industry vs diligence

industry and diligence both are nouns.

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

As nouns, industry and diligence are synonyms defined as:

Other synonyms of industry include industriousness.

industry (noun)	diligence (noun)
the organized action of making of goods and services for sale	a diligent effort
persevering determination to perform a task	persevering determination to perform a task
the people or companies engaged in a particular kind of commercial enterprise	conscientiousness in paying proper attention to a task; giving the degree of care required in a given situation