counting vs reckoning

counting and reckoning both are nouns.

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

As nouns, counting and reckoning are synonyms defined as:

counting and reckoning: the act of counting; reciting numbers in ascending order

Other synonyms of counting include count, enumeration, numeration, tally.

counting (noun)	reckoning (noun)
the act of counting; reciting numbers in ascending order	the act of counting; reciting numbers in ascending order
	problem solving that involves numbers or quantities
	a bill for an amount due