Nightdresses, also known as nightgowns, are comfy sleepwear garments that women usually wear to bed. They come in various kinds of fabric, styles, and designs, which makes them versatile for any preference. Other synonyms for nightdresses include nightshirts, nightwear, sleeping dresses, sleepy shirts, nighties, and PJs. Nightshirts typically refer to longer, more oversized sleepwear that resembles a shirt. Nightwear is a general term used to describe any clothing worn to bed. Sleeping dresses are more feminine and formal, while sleepy shirts are more basic and plain. Nighties tend to be shorter and more revealing, while PJs or pyjamas refer to sleepwear sets that come with a top and bottom.