" radio code" is problematic for number of reasons. One reason is that professionals and laypersons who must read your report wont understand ir, another is that:

it is not clear what you are referring to when you mention "radio code." To better understand and address your concerns, could you please provide more context or specify the specific issue you are facing with the term "radio code"?

Another reason why the term "radio code" is problematic is that it lacks clarity and specificity. It can refer to different things depending on the context. To address this issue, it is essential to provide a more detailed explanation or clarify the specific meaning intended.

If you are referring to a radio code used in communication systems, such as a set of standardized signals or phrases used by radio operators, you can explain it in the following way:

A radio code is a system of signals or pre-defined phrases used in radio communications to convey specific messages efficiently. These codes are commonly utilized in various industries, including aviation, maritime, emergency services, and military operations.

To enhance the understandability of your report, you should consider offering examples of commonly used radio codes in the respective field. You can describe the purpose of these codes and how they are used to facilitate quick and effective communication while minimizing misunderstandings.

By explaining the concept and providing illustrative examples, both professionals and laypersons who read your report will be able to comprehend the meaning of "radio code" more clearly. Remember, clear and concise communication is essential in any written document to enhance understanding and avoid confusion.

You always need to consider who your reading audience is, every time you write anything. This handout explains it.

https://writingcenter.unc.edu/tips-and-tools/audience/

If you are looking for a specific word to fill a blank, however, you'll need to go back into your text or class notes.