What is the antonym of keynote address?

There isn't a single perfect antonym for "keynote address". It depends on the specific context and what you're trying to emphasize. Here are some options, along with their nuances:

Focusing on importance:

* Closing remarks: This emphasizes the end of the event, as opposed to the beginning.

* Secondary presentation: This highlights a less prominent talk.

* Supporting speech: This emphasizes that the speech isn't the main focus of the event.

Focusing on content:

* Technical presentation: This contrasts with a more general, high-level keynote.

* Detailed analysis: This emphasizes a more in-depth examination of a topic.

* Personal anecdote: This contrasts with the more formal, structured nature of a keynote.

Focusing on the speaker:

* Audience participation: This emphasizes the focus on the audience instead of the speaker.

* Panel discussion: This contrasts with a single speaker addressing the audience.

Ultimately, the best antonym will depend on the specific context and what you want to emphasize.