The term Proustian is a reference to the French author Marcel Proust, who is known for his inventive use of memory in his works. It is used to describe something that elicits nostalgia, decadence, or an emphasis on sensory experiences. Other words that can be used as synonyms for Proustian include evocative, sentimental, reminiscent, bittersweet, wistful, languorous, immersive, and indulgent. All these words convey a sense of nostalgia and sentimentality that is associated with past memories and sensory experiences. So, whether it's a scent, taste, sound, or scene, anything that evokes emotions associated with time, memory, and experience can be described as Proustian.