Perversity refers to a deliberate desire to behave in a way that is contrary to what is expected or accepted by society. There are a number of synonyms that can be used to describe this behavior. One is obstinacy, meaning an unbending will or stubbornness. Another possibility is waywardness, which suggests a lack of direction or a wandering off the correct path. Perfidy can also be used, implying a deceitful or treacherous willingness to betray or undermine others. A final option is recalcitrance, indicating a reluctance to follow authority or comply with expectations. Together, these words help to paint a picture of deviant behavior that defies conventional norms and values.