novillada vs bullfight

novillada and bullfight both are nouns.

Word	Noun	Adjective	Verb	Adverb
novillada	Yes	No	No	No
bullfight	Yes	No	No	No

As nouns, bullfight is a hypernym of novillada; that is, bullfight is a word with a broader meaning than novillada:

novillada: a bullfight in which the bulls are less than four years old
bullfight: a Spanish or Portuguese or Latin American spectacle; a matador baits and (usually) kills a bull in an arena before many spectators

Other hypernyms of novillada include corrida.

novillada (noun)	bullfight (noun)
a bullfight in which the bulls are less than four years old	a Spanish or Portuguese or Latin American spectacle; a matador baits and (usually) kills a bull in an arena before many spectators