acmeism vs artistic movement

acmeism and artistic movement both are nouns.

Word	Noun	Adjective	Verb	Adverb
acmeism	Yes	No	No	No
artistic movement	Yes	No	No	No

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

acmeism: An early 20th-century Russian school of poetry that rejected the vagueness and emotionality of Symbolism in favor of Imagist clarity and texture.
artistic movement: a group of artists who agree on general principles

Other hypernyms of acmeism include art movement.

acmeism (noun)	artistic movement (noun)
An early 20th-century Russian school of poetry that rejected the vagueness and emotionality of Symbolism in favor of Imagist clarity and texture.	a group of artists who agree on general principles