Overrating Synonyms and Antonyms

Make too high an estimate of
(Verb)
Synonyms:
  1. overestimating
  2. magnifying
  3. overvaluing
Antonyms:
  1. underestimating
  2. undervaluing
  3. underrating
A calculation that results in an estimate that is too high
(Noun)
Synonyms:
  1. overestimate
  2. overestimation
  3. overreckoning