reckoning vs conversion

reckoning and conversion both are nouns.

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

As nouns, conversion is a hyponym of reckoning; that is, conversion is a word with a more specific, narrower meaning than reckoning:

reckoning (noun)	conversion (noun)
the act of counting; reciting numbers in ascending order	the act of changing from one use or function or purpose to another
problem solving that involves numbers or quantities	a spiritual enlightenment causing a person to lead a new life
a bill for an amount due	a successful free throw or try for point after a touchdown
	act of exchanging one type of money or security for another
	a change in the units or form of an expression:
	interchange of subject and predicate of a proposition
	an event that results in a transformation
	a change of religion
	(psychiatry) a defense mechanism represses emotional conflicts which are then converted into physical symptoms that have no organic basis