The phrase "chilling bone" signifies a feeling of coldness and discomfort that seeps into the bones of a person. While it's hard to think of exact antonyms for this phrase, we can consider the opposite sensations or ideas that it evokes. The opposite of "chilling bone" could be a warm embrace or a feeling of coziness. Synonyms for "chilling" would be "heating" or "warming," and for "bone," it could be "muscle" or "skin." So, antonyms for "chilling bone" would vary depending on the perspective, but ultimately they would describe a sensation of warmth, comfort, and relaxation.