The Castle of Otranto: A Look at the Language

In addition to elements of plot and the supernatural, I feel that it is important to consider the particular sort of words that Horace Walpole has chosen to further reinforce the themes and images that forged The Castle of Otranto into a novel worthy of a lesson in Gothic literature.  Words such as "horror," "dread  ," and  "darkness" are employed countless times throughout the novel, chosen specifically for their texture and association, both denotative and connotative.  A close reading of these nuances in word choice allows a person to better understand the discipline of writing in its many meticulous forms and ventures.  Certainly, one of Walpole's primary tasks involving the writing of this Gothic novel was to fully consider the appropriateness of each word in regards to the Gothic style's images of terrible, absurd, and supernatural things.
What language/words stuck out to you as particularly frequent and precise?