The word "more spinechilling" denotes something that is extremely creepy and frightening. However, if we talk about antonyms for this word, we can come up with some alternatives that reflect a sense of comfort or safety. Some of the antonyms for "more spinechilling" could be peaceful, calming, soothing, comfortable, and reassuring. For instance, if we replace "more spinechilling" with "calming" or "soothing," we can derive a completely different meaning that can evoke feelings of relaxation and serenity instead of fear and horror. Thus, by using the antonyms of "more spinechilling," we can create a broader range of emotional responses and convey different moods in our communication.