Unshockable is a word that refers to someone who cannot be surprised or shocked easily. It describes a person who has seen and experienced a lot, and has developed a sense of immunity to various situations. Some synonyms for this word include imperturbable, unflappable, unimpressed, undaunted, unfazed, unshaken, composed, and cool-headed. Other similar words include unstartled, unalarmed, unbothered, or nonchalant. All of these words describe someone who remains calm and composed in the midst of chaos or surprise, and they embody qualities of resilience and self-control. These words are often used to describe successful people in high-pressure careers, or individuals who have overcome significant obstacles in their lives.