reckoning vs investigating

reckoning and investigating both are nouns.

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

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

reckoning: the act of counting; reciting numbers in ascending order
investigating: the work of inquiring into something thoroughly and systematically

Other hypernyms of reckoning include investigation.

reckoning (noun)	investigating (noun)
the act of counting; reciting numbers in ascending order	the work of inquiring into something thoroughly and systematically
problem solving that involves numbers or quantities
a bill for an amount due