The word "wide-eyed" refers to someone who is open-minded, alert, and perceptive. Synonyms for this word might include "attentive," "alert," "observant," "vigilant," "sharp," or "aware." Other words that could be used in place of "wide-eyed" might include "intent," "keen," "interested," or "engaged." These words suggest an individual who is actively engaged with their environment, or absorbed in the task at hand. Overall, "wide-eyed" signifies a degree of attentiveness and alertness that suggests the individual is highly aware of their surroundings and ready to respond to any challenges that may arise.