1 occurrence
'Impregnable' in the Bible
He will dwell on the heights,His refuge will be the impregnable rock;His bread will be given him,His water will be sure.
Bible Theasaurus
Defensible (1 instance)
Impregnable (2 instances)
Resistless (2 instances)
Secure (159 instances)
Strong (864 instances)
Unassailable (2 instances)