trade union vs trade union movement

trade union and trade union movement both are nouns.

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

trade union (noun)	trade union movement (noun)
an organization of employees formed to bargain with the employer	an organized attempt by workers to improve their status by united action (particularly via labor unions) or the leaders of this movement