labor movement vs IWW

labor movement and IWW both are nouns.

Word	Noun	Adjective	Verb	Adverb
labor movement	Yes	No	No	No
IWW	Yes	No	No	No

As nouns, IWW is a hyponym of labor movement; that is, IWW is a word with a more specific, narrower meaning than labor movement:

labor movement: an organized attempt by workers to improve their status by united action (particularly via labor unions) or the leaders of this movement
IWW: 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

Other hyponyms of labor movement include I.W.W., Industrial Workers of the World, trade unionism, unionism.

labor movement (noun)	IWW (noun)
an organized attempt by workers to improve their status by united action (particularly via labor unions) or the leaders of this movement	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