Vine's Expository Dictionary: View Entry
TDNT Reference: 2:445,215
ἐκδίκησις ekdíkēsis, ek-dik'-ay-sis; from G1556; vindication, retribution:—(a-, re-)venge(-ance), punishment.
The KJV translates Strong's G1557 in the following manner: vengeance (4x), avenge (with G4060) (3x), revenge (1x), punishment (1x).
a revenging, vengeance, punishment
Strong's Number G1557 matches the Greek ἐκδίκησις (ekdikēsis),
which occurs 9 times in 9 verses
in the TR Greek.