crosspost

/K R AO1 S P OW1 S T/
noun
  1. 1

    An electronic message posted to multiple newsgroups simultaneously.

  2. 2

    An act of crossposting.

verb
  1. 1

    To post (a message) to multiple newsgroups simultaneously.

  2. 2

    To make a crosspost.

Source: https://en.wiktionary.org/wiki/crosspost