noun
a word that refers to a person, place, thing, event, substance, or quality
adjective
a word that describes or modifies a noun or pronoun
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Consuming foods high in empty calories can lead to nutrient deficiencies.
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Eating too many snacks with empty calories is not good for your health.
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Don't waste your time on those empty calorie foods.
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His words were like empty calories, providing no real substance or nourishment to the conversation.