As nouns the difference between overdeal and overzeal
is that overdeal is an amount left over; excess while overzeal is excessive zeal.
overdeal
English
Noun
(
en noun)
(obsolete) An amount left over; excess.
* Holland
- The overdeal in the price will be double.
overzeal
English
Noun
(-)
Excessive zeal.
Synonyms
* overzealousness