What does "overpayment" mean?

Payment exceeding the amount actually due.

What is a synonym for "overpayment"?

Common synonyms include: overpay, overpaying, overpays.

noun

noun ·4 syllables ·Rare ·Advanced level

Noun

1
Payment exceeding the amount actually due.
"The employer sued to recover overpayment of wages."
2
the act of paying too much wordnet
3
a payment larger than needed or expected wordnet

"The employer sued to recover overpayment of wages."

From over- + payment.