Mss adjectives are listed in this post. Each word below can often be found in front of the noun mss in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing MSS.
additional, ancient, arabic, best, better, century, certain, cottonian, curious, cursive
different, earlier, earliest, early, english, extant, few, following, french, good
greek, harleian, hist, hist., historical, illuminated, important, inferior, irish, lansdowne
late, later, latin, many, more, most, numerous, old, older, oldest
oriental, original, other, own, precious, principal, rare, same, saxon, several
such, syriac, uncial, unpublished, valuable, various, vatican, welsh
Hope this word list had the adjective used with mss you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.