Milestone adjectives are listed in this post. Each word below can often be found in front of the noun milestone in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing MILESTONE.
big, critical, developmental, fifth
first, fourth, golden, great
historic, historical, important, key
last, major, new, next
roman, second, seventh, significant
sixth, third
Hope this word list had the adjective used with milestone you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.
momentous