fundraiser vs occasion

fundraiser and occasion both are nouns.

Word	Noun	Adjective	Verb	Adverb
fundraiser	Yes	No	No	No
occasion	Yes	No	Yes	No

As nouns, occasion is a hypernym of fundraiser; that is, occasion is a word with a broader meaning than fundraiser:

Other hypernyms of fundraiser include affair, function, social affair, social function, social gathering, social occasion.

fundraiser (noun)	occasion (noun)
a social function that is held for the purpose of raising money	an event that occurs at a critical time
someone who solicits financial contributions	a formal or official social gathering or ceremony of people
	a rational motive for a belief or action
	an opportunity to do something
	the time of a particular event

fundraiser (verb)	occasion (verb)
	give occasion to