Here's why:
* Entity: A thing that exists, has a definite, separate, and independent existence, or is regarded as such. This encompasses everything, from abstract concepts like "love" to concrete objects like a "chair."
* Noun: Refers to a specific person, place, or thing. For example, "John," "London," or "tree."
Think of it this way:
* Entity is the broadest category.
* Noun is a subcategory of entity.
Here's an analogy:
* Entity is like the word "animal."
* Noun is like the word "dog."
While a dog is an animal, not all animals are dogs. Similarly, all nouns are entities, but not all entities are nouns.