what means to cause a commmotion that could ruin a plan?

Diversion?

johns and i have the same homework and it also starts with rock_ _ _ _ _ _ _

Rock the boat?

To cause a commotion that could ruin a plan means to create chaos or disturbance that disrupts the smooth execution of the plan. One word that could describe this action is "diversion."

A diversion refers to an intentional act of drawing attention away from something, often with the aim of distracting or misleading others. In the context of ruining a plan, a diversion could involve creating a disturbance, causing confusion, or initiating a conflict to divert attention and disrupt the planned course of action.

In your second question, if you and John have the same homework assignment that starts with "rock_ _ _ _ _ _ _," a possible answer could be "Rockefeller." However, as the word is not completely revealed, it is difficult to determine the exact answer. It is advisable to carefully review the instructions or consult with your teacher or classmates to clarify the missing parts and find the correct answer.