charm campaign vs effort

charm campaign and effort both are nouns.

Word	Noun	Adjective	Verb	Adverb
charm campaign	Yes	No	No	No
effort	Yes	No	No	No

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

charm campaign: a campaign of flattery and friendliness (by a company, politician, etc.) to become more popular and gain support
effort: a series of actions advancing a principle or tending toward a particular end

Other hypernyms of charm campaign include campaign, cause, crusade, drive, movement.

charm campaign (noun)	effort (noun)
a campaign of flattery and friendliness (by a company, politician, etc.) to become more popular and gain support	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