census vs reckoning

census and reckoning both are nouns.

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

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

Other hypernyms of census include count, counting, enumeration, numeration, tally.

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

census (verb)	reckoning (verb)
conduct a census