Pioneer adjectives are listed in this post. Each word below can often be found in front of the noun pioneer in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing PIONEER.
adventurous, american, brave, century, chief, courageous, distinguished
earliest, early, enterprising, famous, few, first, french
german, good, great, hardy, important, intrepid, leading
little, many, missionary, new, noble, old, original
other, prominent, real, sturdy, successful, such, true
typical, western, worthy, young
Hope this word list had the adjective used with pioneer you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.