Claustrophobia (note spelling 'Claustro' not 'Clustro') is the fear of confined or enclosed spaces. The term comes from Latin 'claustrum' (enclosed place) and Greek 'phobia' (fear). It's a common anxiety disorder where people feel trapped in small spaces. 'Phasmophobia' is fear of ghosts, 'Nyctophobia' is fear of dark, 'Theophobia' is fear of god. Note: question has typo 'Clustrophobia'.