The word "spooked" means to be frightened, alarmed or unsettled. There are a number of synonyms that can be used in its place. For example, the word "startled" suggests that someone has been taken by surprise and is suddenly afraid. "Frightened" is another word that can be used to describe someone who is scared or afraid. "Alarmed" is another option that suggests a sudden awareness of danger or threat. "Agitated" is a word that can describe someone who is nervous or worried, while "unsettled" suggests that someone is feeling out of sorts or uncomfortable. All of these words can be used in place of "spooked" depending on the context and tone of the sentence.