"Gag cartoons" refer to comics that use visual humor to communicate a punchline or joke. There are several synonyms for this term, including "comic strip," which typically features a sequence of panels telling a story or joke. "Cartoon panel" is another synonym, used to describe a single panel cartoon that conveys a humorous or satirical message. "Humorous illustration" is a more general term that can encompass different types of artwork that aim to entertain, while "satirical cartoon" refers to a subgenre of gag cartoons that specifically poke fun at political or social issues. Ultimately, whether it's called a gag cartoon, comic strip, or humorous illustration, the goal is the same: to make the reader laugh.