How noun is differ in opponent and energy?

In the context of opponent and energy, the noun "opponent" refers to a person or group that is competing against or opposing someone or something. It is a concrete noun that represents a specific individual or entity that is in opposition to another.

On the other hand, the noun "energy" refers to the capacity for doing work or producing heat. It is an abstract noun that represents a concept or a quality rather than a specific tangible object or person. Energy can take many forms, such as kinetic energy, potential energy, or thermal energy.

In summary, the noun "opponent" represents a specific person or entity in opposition, while the noun "energy" represents a more abstract concept related to the capacity for action or change.

Opponent is a common noun because it refers to a general class of people who are opposed to someone or something. It is not a proper noun, which would refer to a specific person or thing.

Energy is a mass noun because it refers to a general concept or quality. It is not a count noun, which would refer to a specific amount of something.