ἔκδικος G1558
ékdikos · ek'-dik-os · Adjective
from ἐκ and δίκη; carrying justice out, i.e. a punisher:--a (re-)venger.
2 Occurrences in the King James Bible
Romans 13:4For he is the minister of God to thee for good. But if thou do that which is evil, be afraid; for he beareth not the sword in vain: for he is the minister of God, a revenger to execute wrath upon him that doeth evil.
1 Thessalonians 4:6That no man go beyond and defraud his brother in any matter: because that the Lord is the avenger of all such, as we also have forewarned you and testified.