first derivative vs reckoning

first derivative and reckoning both are nouns.

Word	Noun	Adjective	Verb	Adverb
first derivative	Yes	No	No	No
reckoning	Yes	No	No	No

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

first derivative: 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 first derivative include calculation, computation, figuring.

first derivative (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