minimal art vs art movement

minimal art and art movement both are nouns.

Word	Noun	Adjective	Verb	Adverb
minimal art	Yes	No	No	No
art movement	Yes	No	No	No

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

minimal art: an art movement in sculpture and painting that began in the 1950s and emphasized extreme simplification of form and color
art movement: a group of artists who agree on general principles

Other hypernyms of minimal art include artistic movement.

minimal art (noun)	art movement (noun)
an art movement in sculpture and painting that began in the 1950s and emphasized extreme simplification of form and color	a group of artists who agree on general principles