stab vs effort

stab and effort both are nouns.

Word	Noun	Adjective	Verb	Adverb
stab	Yes	No	Yes	No
effort	Yes	No	No	No

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

stab: informal words for any attempt or effort
effort: earnest and conscientious activity intended to do or accomplish something

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

stab (noun)	effort (noun)
a strong blow with a knife or other sharp pointed instrument	earnest and conscientious activity intended to do or accomplish something
informal words for any attempt or effort	use of physical or mental energy; hard work
a sudden sharp feeling	a notable achievement
	a series of actions advancing a principle or tending toward a particular end