Serenity adjectives are listed in this post. Each word below can often be found in front of the noun serenity in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing SERENITY.
absolute, apparent, beautiful, bright, calm, certain, cheerful, complete, deep, divine
former, grave, great, greater, greatest, habitual, heavenly, high, holy, imperturbable
inner, inward, like, lofty, majestic, mental, mild, more, much, natural
new, noble, outward, own, peaceful, perfect, perpetual, placid, pure, quiet
same, soft, spiritual, sublime, such, sunny, sweet, true, unclouded, undisturbed
unruffled, usual, utmost, wonderful, wonted
Hope this word list had the adjective used with serenity you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.