Defender adjectives are listed in this post. Each word below can often be found in front of the noun defender in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing DEFENDER.
able, ablest, ardent, best, bold, brave, chief, earnest, eloquent
enthusiastic, faithful, fearless, fierce, firm, first, foremost, gallant, great
greatest, heroic, intrepid, last, leading, loyal, natural, noble, old
only, outspoken, own, passionate, powerful, principal, prominent, public, resolute
single, sole, stalwart, stanch, staunch, stout, strenuous, strong, sturdy
successful, true, uncompromising, valiant, vigorous, warm, zealous
Hope this word list had the adjective used with defender you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.