Peignoirs are luxurious garments that are worn over nightwear or lingerie for a glamorous and elegant touch. There are several synonyms for the word peignoirs that can be used interchangeably. One of the most common ones is a robe - a loose-fitting garment that is worn over other clothing to provide warmth and coverage. Another synonym for peignoirs is dressing gown, which is also a long and loose-fitting garment but has a more casual vibe. Kimono is another word that can be used to describe a peignoir, especially if it has a lightweight and flowing fabric. A shawl collar robe is another synonym for a peignoir, highlighting the elegant and sophisticated nature of this garment.