COOP MOM is a term used to describe a mother HEN, who looks after her chicks in a coop. The term is made up of four words: HEN (3 letters), HENS (4 letters), PEN (3 letters), and PEEP (4 letters). HEN is a female chicken, while HENS is the plural form of the word. PEN is a small enclosure for animals, such as chickens, and PEEP is the sound that baby chickens make. Together, these words create the phrase COOP MOM, which is used to describe a mother HEN who looks after her chicks in a PEN or coop.