spatialism vs artistic movement

spatialism and artistic movement both are nouns.

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

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

spatialism: an art movement founded by Italian artist Lucio Fontana in Milan in 1947 in which he intended to synthesize colour, sound, space, movement, and time into a new type of art.
artistic movement: a group of artists who agree on general principles

Other hypernyms of spatialism include art movement.

spatialism (noun)	artistic movement (noun)
an art movement founded by Italian artist Lucio Fontana in Milan in 1947 in which he intended to synthesize colour, sound, space, movement, and time into a new type of art.	a group of artists who agree on general principles