hurdle race vs track event

hurdle race and track event both are nouns.

Word	Noun	Adjective	Verb	Adverb
hurdle race	Yes	No	No	No
track event	Yes	No	No	No

As nouns, track event is a hypernym of hurdle race; that is, track event is a word with a broader meaning than hurdle race:

hurdle race: a footrace in which contestants must negotiate a series of hurdles
track event: a footrace performed on a track (indoor or outdoor)

hurdle race (noun)	track event (noun)
a footrace in which contestants must negotiate a series of hurdles	a footrace performed on a track (indoor or outdoor)