i guess they can be but they're also Adjectives.
Hot and cold are subjective perceptions of temperature, rather than physical characteristics. Temperature is a measure of the average kinetic energy of particles in a substance, with hot indicating high kinetic energy and cold indicating low kinetic energy.
fur
A "hot war" is actually engaged in combat. A "cold war" is not engaged in combat.
earth is hot and cold
dogs
Air moves from hot to cold.
Heat flows from hot to cold.
-Gravity (so it doesnt float away) -Temp (not too hot or cold)
hot, if cold, there is a posibility of a cold!
cold
hot to cold is heat transfer
is it hot or cold tomorrow