The antonyms for the word "action-packed" are calm, peaceful, and serene. If you are looking for something that is the opposite of action-packed, you might try watching a soothing nature documentary, reading a calming book, or going for a peaceful walk in a quiet park. These activities are less likely to get your heart racing and your adrenaline pumping, but they can still be enjoyable in their own way. Although many people enjoy action-packed movies and TV shows, there is something to be said for taking a break and experiencing the calm and peaceful side of life.