avalanche vs occurrence

avalanche and occurrence both are nouns.

Word	Noun	Adjective	Verb	Adverb
avalanche	Yes	No	Yes	No
occurrence	Yes	No	No	No

As nouns, occurrence is a hypernym of avalanche; that is, occurrence is a word with a broader meaning than avalanche:

Other hypernyms of avalanche include happening, natural event, occurrent.

avalanche (noun)	occurrence (noun)
a slide of large masses of snow and ice and mud down a mountain	an event that happens
a sudden appearance of an overwhelming number of things	an instance of something occurring

avalanche (verb)	occurrence (verb)
gather into a huge mass and roll down a mountain, of snow