fund-raising campaign vs fund-raising effort

fund-raising campaign and fund-raising effort both are nouns.

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

As nouns, fund-raising campaign and fund-raising effort are synonyms defined as:

fund-raising campaign and fund-raising effort: a campaign to raise money for some cause

Other synonyms of fund-raising campaign include fund-raising drive.

fund-raising campaign (noun)	fund-raising effort (noun)
a campaign to raise money for some cause	a campaign to raise money for some cause