The antonyms for the word "at boiling point" could be many depending on the context. It could be calm, peaceful, composed, relaxed, and tranquil when referred to emotions or demeanor. In the case of temperature, antonyms could be frozen, chilled, cold, and cool. When talking about water, antonyms could be stagnant, still, motionless, and peaceful. In a figurative sense, the antonyms could be collected, reasonable, practical, logical, and level-headed. These antonyms could help to describe situations where there is no intenseness and stress involved. It is interesting to note how the choice of antonyms depends on the context of the word "at boiling point.