Peak tension refers to the highest level of stress or pressure in a given situation. There are many synonyms for peak tension that can be used depending on the context. Some common words that can be used include climax, apex, pinnacle, summit, and acme. These words indicate that the highest point or most intense moment of a situation has been reached. Other synonyms for peak tension include boiling point, breaking point, breaking stress, critical point, crisis point, and point of no return. These words suggest that a situation has reached a critical stage and that action must be taken to avoid a negative outcome.