overreckoning vs overrating

overreckoning and overrating both are nouns.

Word	Noun	Adjective	Verb	Adverb
overreckoning	Yes	No	No	No
overrating	Yes	No	No	No

As nouns, overreckoning and overrating are synonyms defined as:

overreckoning and overrating: a calculation that results in an estimate that is too high

Other synonyms of overreckoning include overestimate, overestimation.

overreckoning (noun)	overrating (noun)
a calculation that results in an estimate that is too high	a calculation that results in an estimate that is too high