Pantophobia is the irrational fear of everything. Some possible synonyms for pantophobia might include omniphobia, panphobia, or panphobism, which all hint at the sweeping nature of this fear. Other related terms might include xenophobia, which refers to a fear of people or cultures that are different, or agoraphobia, which is a fear of leaving one's home or of being in crowded public spaces. Ultimately, the specific synonyms for pantophobia might depend on the individual and the specific things that they fear, but all share a sense of overwhelming anxiety and dread in response to a wide range of stimuli.