coal industry vs industry

coal industry and industry both are nouns.

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

As nouns, industry is a hypernym of coal industry; that is, industry is a word with a broader meaning than coal industry:

coal industry: the producers of coal considered collectively
industry: the people or companies engaged in a particular kind of commercial enterprise

coal industry (noun)	industry (noun)
the producers of coal considered collectively	the organized action of making of goods and services for sale
	persevering determination to perform a task
	the people or companies engaged in a particular kind of commercial enterprise