painting vs art

painting and art both are nouns.

Word	Noun	Adjective	Verb	Adverb
painting	Yes	No	No	No
art	Yes	No	No	No

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

Other hypernyms of painting include artistic creation, artistic production, beaux arts, fine arts.

painting (noun)	art (noun)
creating a picture with paints	the creation of beautiful or significant things
the occupation of a house painter	the products of human creativity; works of art collectively
the act of applying paint to a surface	a superior skill that you can learn by study and practice and observation
graphic art consisting of an artistic composition made by applying paints to a surface	photographs or other visual representations in a printed publication