heater

As a verb defrost

is to remove frost from.

As a noun heater is

a device that produces and radiates heat, typically to raise the temperature of a room or building.

As nouns the difference between heater and thermostat

is that heater is a device that produces and radiates heat, typically to raise the temperature of a room or building while thermostat is thermostat.

As a noun heater

is a device that produces and radiates heat, typically to raise the temperature of a room or building.

As an adjective undefined is

lacking a definition or value.

As an adjective tankless

is without a tank (used especially of water heaters).

As a noun heater is

a device that produces and radiates heat, typically to raise the temperature of a room or building.

As a verb warm

is .

As a noun heater is

a device that produces and radiates heat, typically to raise the temperature of a room or building.

As an adjective easter

is (obsolete) eastern.

As a noun heater is

a device that produces and radiates heat, typically to raise the temperature of a room or building.

As nouns the difference between heater and preheater

is that heater is a device that produces and radiates heat, typically to raise the temperature of a room or building while preheater is an engineering device that preheats a material prior to some other process.

As nouns the difference between heater and radiator

is that heater is a device that produces and radiates heat, typically to raise the temperature of a room or building while radiator is radiator (heater).