"Scares silly" refers to an overwhelming and irrational fear, which is often accompanied by a loss of composure. On the other hand, antonyms for the phrase "scares silly" include words such as courage, confidence, fearlessness, bravery, and composure. These words denote a state of being fearless, calm, and in control, even in the face of danger or threat. Having courage or bravery can help individuals face their fears head-on, while confidence and fearlessness can enable them to stand up for themselves and make difficult decisions without feeling intimidated or overwhelmed. Overall, using these antonyms can help individuals channel their inner strength and confidence to overcome their fears and confront challenges with resilience and determination.