Extended Strong's Greek Lexicon (Abbott-Smith based)
vengeance
Usage: ἐκ-δίκησις, -εως, ἡ (ἐκδικέω), [in LXX chiefly for נָקָם ;] vengeance, vindication: Luk.21:22, Rom.12:19 (see MM, Exp., xii), Heb.10:30 (LXX), 2Co.7:11; of the injured person, with genitive, Luk.18:7-8; with dative, Act.7:24; of the offender, with genitive obj., 1Pe.2:14; with dative, 2Th.1:8 (cf. Sir.12:6).† (AS)