fund-raising campaign vs effort

fund-raising campaign and effort both are nouns.

Word	Noun	Adjective	Verb	Adverb
fund-raising campaign	Yes	No	No	No
effort	Yes	No	No	No

As nouns, effort is a hypernym of fund-raising campaign; that is, effort is a word with a broader meaning than fund-raising campaign:

fund-raising campaign: a campaign to raise money for some cause
effort: a series of actions advancing a principle or tending toward a particular end

Other hypernyms of fund-raising campaign include campaign, cause, crusade, drive, movement.

fund-raising campaign (noun)	effort (noun)
a campaign to raise money for some cause	earnest and conscientious activity intended to do or accomplish something
	use of physical or mental energy; hard work
	a notable achievement
	a series of actions advancing a principle or tending toward a particular end