extrapolation vs reckoning

extrapolation and reckoning both are nouns.

Word	Noun	Adjective	Verb	Adverb
extrapolation	Yes	No	No	No
reckoning	Yes	No	No	No

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

extrapolation: (mathematics) calculation of the value of a function outside the range of known values
reckoning: problem solving that involves numbers or quantities

Other hypernyms of extrapolation include calculation, computation, figuring.

extrapolation (noun)	reckoning (noun)
(mathematics) calculation of the value of a function outside the range of known values	the act of counting; reciting numbers in ascending order
an inference about the future (or about some hypothetical situation) based on known facts and observations	problem solving that involves numbers or quantities
	a bill for an amount due