protectionism

As nouns the difference between protectionism and antiprotectionism

is that protectionism is (politics|economics) a system or policy of protecting the domestic producers of a product from foreign competition by imposing tariffs, quotas, duties or other barriers on importations while antiprotectionism is opposition to protectionism.

As a noun protectionism

is (politics|economics) a system or policy of protecting the domestic producers of a product from foreign competition by imposing tariffs, quotas, duties or other barriers on importations.

As an adjective antiprotectionist is

describing a person who disapproves of protectionism, or of a policy that is counter to protectionism.