Muumuu is a loose-fitting dress that is comfortable and convenient to wear. This word originated from Hawaiian culture and is often associated with relaxation and ease. Although it is a fairly specific term, there are other words that can be used as synonyms for the word muumuu. Some of these words include house dress, caftan, tunic, shift dress, and sundress. House dress is similar to muumuu in that it is also a comfortable dress that is meant to be worn indoors. A caftan is a kind of long outer garment that is both comfortable and fashionable. A tunic and shift dress are both loose-fitting garments that can be worn in a variety of settings. A sundress is a light, sleeveless dress that is perfect for warm weather.