Romanticism vs artistic style

Romanticism and artistic style both are nouns.

Word	Noun	Adjective	Verb	Adverb
Romanticism	Yes	No	No	No
artistic style	Yes	No	No	No

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

Romanticism: a movement in literature and art during the late 18th and early 19th centuries that celebrated nature rather than civilization
artistic style: the style of a particular artist or school or movement

Other hypernyms of Romanticism include idiom, arts, humanistic discipline, humanities, liberal arts.

Romanticism (noun)	artistic style (noun)
a movement in literature and art during the late 18th and early 19th centuries that celebrated nature rather than civilization	the style of a particular artist or school or movement