Flanks adjectives are listed in this post. Each word below can often be found in front of the noun flanks in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing FLANKS.
eastern, extreme, left
lower, northern, outer
own, right, silken
southern, steep, western
Hope this word list had the adjective used with flanks you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.