Dreadingly, meaning filled with dread or apprehension, can be substituted with several synonyms to enhance the vocabulary and make the text more engaging. Words such as apprehensively, fearfully, and nervously convey a similar sense of anxiety and unease. Alternatively, using intimidatedly, timorously, or scaredly could add a touch of vulnerability to the feeling of dread. Another option is to use panicky or terrified to emphasize the extent of the fear. Overall, depending on the context and tone, there are many synonyms for dreadingly, each with their own subtle nuances and connotations.