fate vs occurrence

fate and occurrence both are nouns.

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

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

fate: an event (or a course of events) that will inevitably happen in the future
occurrence: an event that happens

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

fate (noun)	occurrence (noun)
an event (or a course of events) that will inevitably happen in the future	an event that happens
the ultimate agency regarded as predetermining the course of events	an instance of something occurring
your overall circumstances or condition in life (including everything that happens to you)

fate (verb)	occurrence (verb)
decree or designate beforehand