The word energy is a noun. The plural form is energies.
adverb
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Noun
"Seismic" is an adjective modifying the noun "energy."
The word energetic is an adjective. It means to be full of energy.
The word "listless" is an adjective. It describes someone who lacks energy or enthusiasm.
The part of speech for "answer" is a noun.
The word geothermal is an adjective. It means pertaining to heat energy extracted from the earth's interior.
part of speech
The part of speech for this particular word is a noun.
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adverb
The word "vibrant" is an adjective. It is used to describe something or someone that is full of energy, brightness, and liveliness.