railer, reviler

Strong’s Dictionary of Greek Words:

Number:
3060 (find all occurrences in KJV Bible)
Greek:
λοίδορος
Transliteration:
loidoros
Phonic:
loy’-dor-os
Meaning:
from λοιδός (mischief); abusive, i.e. a blackguard
KJV Usage:
railer, reviler