Nouns

(n)decadenta person who has fallen into a decadent state (morally or artistically)

Adjectives

(s)decadentluxuriously self-indulgent“I spent a decadent day at a spa”
(s)decadent, fin-de-sieclemarked by excessive self-indulgence and moral decay“a decadent life of excessive money and no sense of responsibility”