offspring vs event

offspring and event both are nouns.

Word	Noun	Adjective	Verb	Adverb
offspring	Yes	No	No	No
event	Yes	No	No	No

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

Other hypernyms of offspring include consequence, effect, issue, outcome, result, upshot.

offspring (noun)	event (noun)
any immature animal	something that happens at a given place and time
something that comes into existence as a result	a phenomenon located at a single point in space-time; the fundamental observational entity in relativity theory
the immediate descendants of a person	a phenomenon that follows and is caused by some previous phenomenon
	a special set of circumstances