crosspost

• cross-post
• xpost (abbreviation)

From cross- +‎ post.

crosspost (plural crossposts)

1. (Internet) An electronic message posted to multiple newsgroups or forums simultaneously.
2. (computing, indexing) An instance of crossposting, or the post thus created.

crosspost (third-person singular simple present crossposts, present participle crossposting, simple past and past participle crossposted)

2. (Internet, ambitransitive) To post (a message) to multiple newsgroups or forums simultaneously.
4. (indexing, especially physically) To post an entry (in a book index or other index) such that no matter which word a user looks under, they will find the relevant entry (see examples).

• multipost
• velveeta