simultaneity

Continuing the discussion from The Godmakers:

https://en.wiktionary.org/wiki/simultaneity

simultaneity ( countable and uncountable , plural simultaneities )

  1. The quality or state of being simultaneous; simultaneousness.
  2. (music) More than one complete musical texture occurring at the same time. This first appeared in the music of Charles Ives, and is common in the music of Conlon Nancarrow, and others.

It’s nice to have words for special occasions.