The word "owling" is a relatively new term that refers to the act of bird-watching, particularly for owls, at night. However, there are many other expressions that can be used to convey the same concept. For example, some people might refer to it as nocturnal birding, while others may simply call it owl watching or birding after dark. Additionally, terms like night birding, night owling, and owl spotting are also common synonyms for this activity. Essentially, any phrase that conveys the idea of observing birds at night, and specifically, owls, can be considered a synonym for owling.