Extravagance adjectives are listed in this post. Each word below can often be found in front of the noun extravagance in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing EXTRAVAGANCE.
absurd, boundless, certain, equal, fanatical, foolish, general, great
greater, greatest, gross, last, lavish, less, little, luxurious
mad, mere, more, much, national, needless, only, other
own, personal, private, public, reckless, romantic, royal, same
senseless, sheer, splendid, such, thoughtless, unnecessary, useless, utmost
very, wanton, wasteful, wild, wildest
Hope this word list had the adjective used with extravagance you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.