irruption vs natural event

irruption and natural event both are nouns.

Word	Noun	Adjective	Verb	Adverb
irruption	Yes	No	No	No
natural event	Yes	No	No	No

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

irruption: a sudden violent spontaneous occurrence (usually of some undesirable condition)
natural event: an event that happens

Other hypernyms of irruption include happening, occurrence, occurrent.

irruption (noun)	natural event (noun)
a sudden violent entrance; a bursting in	an event that happens
a sudden violent spontaneous occurrence (usually of some undesirable condition)
a sudden sharp increase in the relative numbers of a population