Pj's, short for "pyjamas", can be described with a variety of synonyms. Some of the most common synonyms used for pj's include sleepwear, nightclothes, nightwear, jammies, loungewear, and bedtime attire. Each of these synonyms refers to the type of clothing worn during sleep or while lounging around the house. While some may use the term "pj's" to refer specifically to traditional two-piece pyjama sets, these other synonyms encompass a broader range of clothing styles, including onesies, nightgowns, and even casual clothing often worn as sleepwear. Whatever term one may prefer to use, the important thing is that you feel comfortable and relaxed in your sleepwear of choice.