Stag adjectives are listed in this post. Each word below can often be found in front of the noun stag in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing STAG.
antlered, big, dead, fine
first, great, horned, hunted
large, magnificent, noble, old
red, royal, stately, white
wild, wounded, young
Hope this word list had the adjective used with stag you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.
Magestic
Mighty