horology vs art

horology and art both are nouns.

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

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

horology: the art of designing and making clocks
art: a superior skill that you can learn by study and practice and observation

Other hypernyms of horology include artistry, prowess.

horology (noun)	art (noun)
the art of designing and making clocks	the creation of beautiful or significant things
	the products of human creativity; works of art collectively
	a superior skill that you can learn by study and practice and observation
	photographs or other visual representations in a printed publication