industrial union vs labor union

industrial union and labor union both are nouns.

Word	Noun	Adjective	Verb	Adverb
industrial union	Yes	No	No	No
labor union	Yes	No	No	No

As nouns, labor union is a hypernym of industrial union; that is, labor union is a word with a broader meaning than industrial union:

industrial union: a labor union that admits all workers in a given industry irrespective of their craft
labor union: an organization of employees formed to bargain with the employer

Other hypernyms of industrial union include brotherhood, trade union, trades union, union.

industrial union (noun)	labor union (noun)
a labor union that admits all workers in a given industry irrespective of their craft	an organization of employees formed to bargain with the employer