• zncien regime,
• sncien regime,
• wncien regime,
• qncien regime,
• abcien regime,
• amcien regime,
• ajcien regime,
• ahcien regime,
• anxien regime,
• anvien regime,
• anfien regime,
• andien regime,
• ancuen regime,
• ancjen regime,
• ancken regime,
• ancoen regime,
• anc9en regime,
• anc8en regime,
• anciwn regime,
• ancisn regime

The adjective form of "ancien régime" is "ancien régime" itself. It is commonly used to describe the social and political system that existed in France before the French Revolution.