The term 'Night Prowler' can be broken down into two crossword solutions: PUMA (4 letters) and ALLEYCAT (8 letters). A PUMA is a large cat native to the Americas, also known as a cougar or mountain lion. It is a solitary animal that is most active at night, hence its association with the term 'Night Prowler'. An alleycat is a domestic cat that lives outdoors, often in urban areas. They are usually feral cats, meaning they are not owned by anyone and live in colonies. Alleycats are also nocturnal, so they are often seen prowling around at night.