* Noun: When referring to the strength or force of something.
* "The intensity of the earthquake was terrifying."
* Adjective: When describing something as having a high degree of strength or force.
* "The intensity of the colors in the painting was impressive."
It is not commonly used as a verb or adverb.
However, there are some less common usages:
* Verb: In a very specific context, "to intensify" can be used to mean to make something stronger or more intense.
* "The storm intensified as it moved inland."
* Adverb: While not standard usage, "intensely" is a common adverb, meaning "with great intensity."
* "They looked at each other intensely."
Therefore, the most common parts of speech for "intensity" are noun and adjective.