Here are some examples:
Noun:
* The administration announced a new policy. (The word "administration" refers to the group of people in charge, like a government or a company.)
* The university's administration is located in the main building. (Here, "administration" refers to the department that handles administrative tasks.)
Adjective:
* The administrative costs were high. (The word "administrative" modifies the noun "costs" and describes the type of costs.)
* She has an administrative role in the company. (Here, "administrative" describes the kind of role she has.)