Terror

An intense, unpleasant emotion arising from death awareness, or from stimuli that arouse mortality salience (i.e. reminders of one’s eventual, impending death).

Reference:
Hirschberger, G., Florian, V., & Mikulincer, M. (2005). Fear and Compassion: A Terror Management Analysis of Emotional Reactions to Physical Disability. Rehabilitation Psychology, 50(3), 246-257. doi: 10.1037/0090-5550.50.3.246

Hayes, J., Schimel, J., Arndt, J., & Faucher, E. H. (2010). A theoretical and empirical review of the death-thought accessibility concept in terror management research. Psychological Bulletin, 136(5), 699-739. doi: 10.1037/a0020524