- overestimate, overestimation, overvaluation, overappraisal - an appraisal that is too high
--1 is a kind of appraisal, estimate, estimation
Derived forms: verb overestimate2, verb overestimate1 - overestimate, overestimation, overrating, overreckoning - a calculation that results in an estimate that is too high
--2 is a kind of estimate, estimation, approximation, idea
Derived form: verb overestimate1