"Thermal" is a word in ENGLISH

An instrument for examining the thermal resistance or heat-conducting power of liquids.

Any action between two bodies which changes, or tends to change, their relative condition as to rest or motion; or, …

An apparatus for the production of sound by the action of luminous or thermal rays. It is essentially the same …

In a thermal manner.

Of or pertaining to heat; due to heat; thermal; as, thermic lines.

Of or relating to heat and electricity; especially, relating to thermal effects produced by voltaic action.