I.W.W. vs trade union movement

I.W.W. and trade union movement both are nouns.

Word	Noun	Adjective	Verb	Adverb
I.W.W.	Yes	No	No	No
trade union movement	Yes	No	No	No

As nouns, trade union movement is a hypernym of I.W.W.; that is, trade union movement is a word with a broader meaning than I.W.W.:

I.W.W.: a former international labor union and radical labor movement in the United States; founded in Chicago in 1905 and dedicated to the overthrow of capitalism; its membership declined after World War I
trade union movement: an organized attempt by workers to improve their status by united action (particularly via labor unions) or the leaders of this movement

Other hypernyms of I.W.W. include brotherhood, labor union, trade union, trades union, union, labor, labor movement, labour.

I.W.W. (noun)	trade union movement (noun)
a former international labor union and radical labor movement in the United States; founded in Chicago in 1905 and dedicated to the overthrow of capitalism; its membership declined after World War I	an organized attempt by workers to improve their status by united action (particularly via labor unions) or the leaders of this movement