Words similar to firewall

Example sentences for: firewall

How can you use “firewall” in a sentence? Here are some example sentences to help you improve your vocabulary:

Though it is often treated as a milder form of racism, there is no firewall of principle separating one form of racism from another.
Book -- Firewall: The Iran-Contra Conspiracy and Cover-Up , by Lawrence E. Walsh;
It's not an absolute firewall anymore, is it?
UPS, which alleges that USPS uses its first-class mail monopoly profits to subsidize competitive services, has asked that the firewall between the Postal Service's monopoly and competitive services be strengthened.