derived function vs reckoning

derived function and reckoning both are nouns.

Word	Noun	Adjective	Verb	Adverb
derived function	Yes	No	No	No
reckoning	Yes	No	No	No

As nouns, reckoning is a hypernym of derived function; that is, reckoning is a word with a broader meaning than derived function:

derived function: the result of mathematical differentiation; the instantaneous change of one quantity relative to another; df(x)/dx
reckoning: problem solving that involves numbers or quantities

Other hypernyms of derived function include calculation, computation, figuring.

derived function (noun)	reckoning (noun)
the result of mathematical differentiation; the instantaneous change of one quantity relative to another; df(x)/dx	the act of counting; reciting numbers in ascending order
	problem solving that involves numbers or quantities
	a bill for an amount due