craft union vs trade union

craft union and trade union both are nouns.

Word	Noun	Adjective	Verb	Adverb
craft union	Yes	No	No	No
trade union	Yes	No	No	No

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

craft union: a labor union whose membership is restricted to workers in a particular craft
trade union: an organization of employees formed to bargain with the employer

Other hypernyms of craft union include brotherhood, labor union, trades union, union.

craft union (noun)	trade union (noun)
a labor union whose membership is restricted to workers in a particular craft	an organization of employees formed to bargain with the employer