The term 'cleanliness regimens' refers to a set of practices and procedures that are designed to promote cleanliness and hygiene. Hygiene, which is an 8-letter word that can be used to describe these regimens, is the practice of keeping oneself and one's environment clean in order to prevent the spread of disease and maintain good health. Cleanliness regimens may include regular handwashing, wearing protective clothing, and using disinfectants to clean surfaces.