Thermal
Part of speech: noun
Definition: A column of rising air in the lower atmosphere created by uneven heating of Earth's surface.
Part of speech: adjective
Definition: pertaining to heat or temperature. providing efficient insulation so as to keep the body warm.
Example sentence: I am very focused on large-scale deployments of renewable power and how we're going to get this done. Imagine our military bases covered with solar thermal collectors that could generate steam and electricity.
Thermic
Part of speech: adjective
Definition: of, related to, or associated with heat; thermal