What is a combination of two non-code words that may or may not be classified known as?

The correct answer is a combination of two non-code words that may or may not be classified is known as an exercise term. Exercise terms are typically used within military communications and training scenarios to create clear and concise references that facilitate better understanding and coordination among personnel involved in exercises. They do not necessarily fall under the strict classification of code words, allowing for flexibility in usage.

In contrast, other terms listed refer to different aspects of military communication or operations. A code phrase specifically implies a coded reference that may serve a specific function in secure communications and is generally predetermined for clarity in a tactical context. Directive terms and operational terms also pertain to functional communications but tend to be more formalized and tied to specific orders or operational guidelines rather than the more general use seen with exercise terms.