Dead air and Speechlessness

Dead air noun - An inadvertent interruption in a broadcast during which there is no sound.

Speechlessness and dead air are semantically related in speech topic. In some cases you can use "Speechlessness" instead a noun phrase "Dead air", when it comes to topics like silence, calmness.

Speechlessness noun - Incapacity for or restraint from speaking.

Dead air and speechlessness are semantically related in silence topic. You can use "Dead air" instead a noun "Speechlessness".