When a gas turns into a liquid it's called condensation.
Condensation is when a gas turns into a liquid.
Condensation is what you can see formed on the inside of windows in your house or vehicle.
When a liquid changes into a solid, it is called solidification.
When a gas changes into a solid, it is called deposition and when a liquid changes into gas, it is called evaporation.
Condensation is the change of the physical state of matter from the gas phase into the liquid phase, and is the reverse of vaporization.
The word most often refers to the water cycle.