Ghosts adjectives are listed in this post. Each word below can often be found in front of the noun ghosts in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing GHOSTS.
ancestral, angry, damned, dim, evil, few, friendly
gentle, gray, great, grecian, grey, holy, horrid
hungry, like, little, many, mere, more, most
old, only, other, own, pale, pallid, poor
real, restless, several, shadowy, sheeted, silent, such
thin, unhappy, vengeful, very, white
Hope this word list had the adjective used with ghosts you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.
frail
I think you should add the word mysterious
spooky
scary