* Libertine: A person who is unrestrained by moral or social conventions, especially in sexual matters.
* Rake: A dissolute or immoral person, especially a man who is sexually promiscuous.
* Free spirit: Someone who is unconcerned with social norms and enjoys spontaneity.
* Bohemian: A person who lives an unconventional lifestyle, often in an artistic or creative community.
* Hedonist: A person who believes that pleasure is the most important thing in life.
* Licentious: Unrestrained by moral or legal constraints, especially in sexual matters.
It's important to note that these antonyms carry different connotations and should be used with care. For example, "libertine" may be considered a more negative term than "free spirit."