The word "terror-smitten" refers to the state of being deeply affected by fear or terror. There are a number of synonyms that can be used to convey this sense of extreme fear, such as "terror-stricken," "horrified," "shaken," "frightened," "appalled," and "panicked." Other similar words include "terrified," "petrified," "spooked," "haunted," and "intimidated." Depending on the context in which the word is being used, different synonyms may be more appropriate than others. For instance, "terror-stricken" may be used to describe the reaction of someone who has just witnessed a horror movie, while "horrified" may be more appropriate for describing the reaction of someone who has just experienced a traumatic event.