athermal

As adjectives the difference between athermal and athermic

is that athermal is (physics) describing any process that does not involve either heat or a change in temperature while athermic is resistant to heat passing through; heat-resistant, heat-proof.

As adjectives the difference between athermal and isothermal

is that athermal is (physics) describing any process that does not involve either heat or a change in temperature while isothermal is of or pertaining to a process that takes place at constant temperature.

As a noun isothermal is

(geography) an isotherm.

As adjectives the difference between athermal and thermal

is that athermal is (physics) describing any process that does not involve either heat or a change in temperature while thermal is pertaining to heat or temperature.

As a noun thermal is

(meteorology) a column of rising air in the lower atmosphere created by uneven heating of earth's surface.

As a noun temperature

is temperature.

As an adjective athermal is

(physics) describing any process that does not involve either heat or a change in temperature.

As a noun heat

is (military) high explosive antitank: a munition using a high explosive shaped charge to breach armour.

As an adjective athermal is

(physics) describing any process that does not involve either heat or a change in temperature.