The antonyms for the term "headlining" can be interpreted in various ways depending on the context. In the field of journalism, antonyms for headlining can include "buried," "obscured," or "dismissed." Meanwhile, in the entertainment industry, the antonyms may include "opening act," "supporting cast," or "background performer." In the world of politics, the opposite of headlining can be "secretive," "unmentioned," or "ignored." Other antonyms may involve "understated," "modest," or "low-key" in terms of emphasis or importance. In general, antonyms for headlining can come in many different forms and may depend on how the term is being used in a particular situation.