Strongholds
From BiblePortal Wikipedia
Strongholds [1]
1: ὀχύρωμα (Strong'S #3794 Noun Neuter ochuroma okh-oo'-ro-mah )
"a stronghold, fortress" (akin to ochuroo, "to make firm"), is used metaphorically in 2 Corinthians 10:4 , of those things in which mere human confidence is imposed.