French-English translations for surestimation

• overestimate
  I overestimated the number of attendees, and bought far too much food for the party.
• overestimation
  Is this pipe dream not based on a huge overestimation of the human race? Ce projet chimérique ne se base-t-il pas sur une surestimation considérable de la race humaine?

Related words

• surestimer
• surestimé
• surestarie