Strong’s Greek
G5622 — opheleia
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ὠφέλεια
opheleia — pronounced o-fel'-i-ah
from a derivative of the base of 5624; usefulness, i.e. benefit:--advantage, profit. see GREEK for 5624
2 occurrences in the KJV.
Romans 3:1
What advantage then hath the Jew? or what profit is there of circumcision?
Jude 1:16
These are murmurers, complainers, walking after their own lusts; and their mouth speaketh great swelling words, having men’s persons in admiration because of advantage.