ὀχύρωμα G3794
ochýrōma · okh-oo'-ro-mah · Noun Neuter
from a remote derivative of ἔχω (meaning to fortify, through the idea of holding safely); a castle (figuratively, argument):--stronghold.
1 Occurrence in the King James Bible
2 Corinthians 10:4(For the weapons of our warfare are not carnal, but mighty through God to the pulling down of strong holds;)