overreckoning vs overestimate

overreckoning and overestimate both are nouns.

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

As nouns, overreckoning and overestimate are synonyms defined as:

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

Other synonyms of overreckoning include overestimation, overrating.

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

overreckoning (verb)	overestimate (verb)
	make too high an estimate of
	assign too high a value to