Pressurization (noun)

1. The act or process of pressurizing, especially the introduction of pressurized air or gas into a container or system.
2. The state or condition of being pressurized.

Origin:

From the verb pressurize + -ation, formed on the model of the nouns nationalization and industrialization.

Examples:

1. The pressurization of the spacecraft allowed it to withstand the extreme conditions of space.
2. The pressurization of the gas pipeline increased the efficiency of transportation.
3. The pressurization of the tire ensured it wouldn't lose air while in use.
4. The pressurization system in the airplane maintains a comfortable cabin environment at high altitudes.
5. The pressurization of the water tank was necessary to keep the fish healthy.