overcount

over- +‎ count

overcount (third-person singular simple present overcounts, present participle overcounting, simple past and past participle overcounted)

1. (transitive) To count more of something than are actually present, or to count one thing disproportionately more than another

   The census overcounted people in some neighborhoods, and undercounted them in others.

2. (transitive) To outnumber.

• undercount

overcount (plural overcounts)

1. An incorrect count that is too high.

• undercount