* Common noun: This is the most basic type of noun, referring to a general concept. In this case, "report" is a written or spoken account of something that has happened.
* Example: "The police officer filed a report on the accident."
* Abstract noun: This type of noun refers to an idea, quality, or state rather than a physical object. In this case, "report" can refer to the act of reporting.
* Example: "The report of the investigation was shocking."
* Collective noun: This type of noun refers to a group of people or things. "Report" can be used collectively to refer to a group of reporters or a group of written reports.
* Example: "The report gathered for the meeting was overwhelming."
It's important to consider the context of the sentence to determine the specific type of noun "report" is acting as.