Just FYI, for the sake of the discussion, here's one of my lexicon's definitions for the word ὄλεθρος ("
destruction")
in 2 Thessalonians 1:9.
ὄλεθρος, -ον, (ὄλλυμι to destroy [perh. (ὄλνυμι) allied to Lat. vulnus]), fr. Hom. down, ruin, destruction, death: 1 Th. 5:3; 1 Tim. 6:9; εἰς ὄλεθρον τῆς σαρκός, for the destruction of the flesh, said of the external ills and troubles by which the lusts of the flesh are subdued and destroyed, 1 Co. 5:5 [see παραδίδωμι, 2]; i. q. the loss of a life of blessedness after death, future misery, αἰώνιος (as 4 Macc. 10:15): 2 Th. 1:9 [where L txt. ὀλέθριον, q. v.], cf. Sap. 1:12.* ~Thayer, J. H. (1889). A Greek-English lexicon of the New Testament
~Deut