BTW, "good news" or gospel is a term somewhat exclusive to Jesus Christ's time...so I don't think Noah preached the good news.
The WTS uses buzzwords that "add" to the Bible.
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w03 12/15 p. 18 Our Watchfulness Takes On Greater Urgency ***He was also "a preacher." (2 Peter 2:5) What message did he preach? Noah’s preaching evidently included a call for repentance and a warning of coming destruction.
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it-1 p. 1089 Herald ***Ke·rys´so,
in general, means "proclaim" (good or bad news), as distinguished from eu·ag·ge·li´zo·mai, "declare good news." Noah was a preacher (or herald, ke´ryx) to the antediluvian world, warning them. (2Pe 2:5)
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it-2 p. 671 Preacher, Preaching ***Noah’s preaching righteousness prior to the Flood evidently included a call for repentance and a warning of coming destruction, as is evidenced by Jesus’ reference to the people’s ‘failing to take note.’ (Mt 24:38, 39) Noah’s divinely authorized public proclamation, therefore, was not primarily a bringing of good news.
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it-2 p. 674 Preacher, Preaching ***At 1 Peter 3:19, 20, after describing Jesus’ resurrection to spirit life, the apostle says: "In this state also he went his way and preached to the spirits in prison, who had once been disobedient when the patience of God was waiting in Noah’s days, while the ark was being constructed." Commenting on this text, Vine’s Expository Dictionary of Old and New Testament Words says: "In I Pet. 3:19 the probable reference is, not to glad tidings (which there is no real evidence that Noah preached, nor is there evidence that the spirits of antediluvian people are actually ‘in prison’), but to the act of Christ after His resurrection in proclaiming His victory to fallen angelic spirits." (1981, Vol. 3, p. 201)