Strong’s Greek
G3060 — loidoros
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
λοίδορος
loidoros — pronounced loy'-dor-os
from loidos (mischief); abusive, i.e. a blackguard:--railer, reviler.
2 occurrences in the KJV.
1 Corinthians 5:11
But now I have written unto you not to keep company, if any man that is called a brother be a fornicator, or covetous, or an idolater, or a railer, or a drunkard, or an extortioner; with such an one no not to eat.
1 Corinthians 6:10
Nor thieves, nor covetous, nor drunkards, nor revilers, nor extortioners, shall inherit the kingdom of God.