Question

What is the difference between hot and heat

Answer 1

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The hotter an object is, the faster the motion of the molecules inside it. Thus, the heat of an object is the total energy of all the molecular motion inside that object. Temperature, on the other hand, is a measure of the average heat or thermal energy of the molecules in a substance.
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Answer 2

Heat is the transfer of energy, usually denoted by the letter Q.

Hot is used to describe how much thermal energy an object as.

Together we can say hot things tend to transfer energy to cold things via heat if left alone. This is the Second law of Thermodynamics at work.