unionism vs labor movement

unionism and labor movement both are nouns.

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

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

unionism: the system or principles and theory of labor unions
labor 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 unionism include labor, labour, trade union movement.

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