Fortifications adjectives are listed in this post. Each word below can often be found in front of the noun fortifications in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing FORTIFICATIONS.
additional, american, ancient, british, coastal, confederate, defensive
elaborate, extensive, formidable, french, german, great, heavy
impregnable, massive, medieval, military, modern, natural, new
old, other, outer, own, permanent, powerful, regular
roman, rude, ruined, strong, strongest, such, temporary
Hope this word list had the adjective used with fortifications you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.