Greek: λοιδορος [loidoros] (Noun masculine). Abusive, slanderous, reviler.

λοιδορος [loidoros] appears 2 times in the NT:

(1) 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. - λοιδορος [loidoros] Nom. sing.

(2) 1 Corinthians 6: 10
Nor thieves, nor covetous, nor drunkards, nor revilers, nor extortioners, shall inherit the kingdom of God. - λοιδοροι [loidoroi] Nom. pl.