It's possible you're encountering this term in a specific context, like a particular textbook or theory. If you can provide more context, I might be able to understand what is meant by "intensive noun" in that specific instance.
Here's what I can offer based on the possibility of misinterpretation:
* Intensive Pronouns: There are "intensive pronouns," also called "emphatic pronouns," which emphasize the noun or pronoun they refer to. These pronouns are formed by adding "-self" or "-selves" to a personal pronoun (e.g., myself, yourself, himself, herself, itself, ourselves, yourselves, themselves).
* Nouns Describing Intensity: Some nouns might be used to describe intensity or strength. For example: "The heat of the sun was unbearable," or "He spoke with passion." These nouns describe the quality of something, not a specific type of noun.
Please provide more information about where you encountered the term "intensive noun" so I can help you better understand its meaning.