takeover attempt vs effort

takeover attempt and effort both are nouns.

Word	Noun	Adjective	Verb	Adverb
takeover attempt	Yes	No	No	No
effort	Yes	No	No	No

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

takeover attempt: an attempt to take control of a corporation
effort: earnest and conscientious activity intended to do or accomplish something

Other hypernyms of takeover attempt include attempt, endeavor, endeavour, try.

takeover attempt (noun)	effort (noun)
an attempt to take control of a corporation	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