Commentaries:
Jamieson, Fausset, and Brown
eighth—that is, Noah, and seven others. Contrasted with the densely peopled "world of the ungodly."
preacher—not only "righteous" himself (compare II Peter 2:8), but also "a preacher of righteousness": adduced by Peter against the licentiousness of the false teachers (II Peter 2:2) who have no prospect before them but destruction, even as it overtook the ungodly world in Noah's days.
Other Jamieson, Fausset, and Brown entries containing 2 Peter 2:5:
Genesis 6:3
Matthew 21:32
Hebrews 11:7
1 Peter 3:18
2 Peter 2:1
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