After and Prior to

After

After preposition - Subsequent to in time or order.
Usage example: the brass band came right after the mayor in the parade

Prior to is an antonym for after in at the end of topic.

Prior to

Prior to preposition - Earlier than.
Usage example: make sure all revisions are approved by the author prior to publication

After is an antonym for prior to in earlier than topic.
Cite this Source
Prior to and After. (2016). Retrieved 2022, June 29, from https://thesaurus.plus/related/after/prior_to
After & Prior to. N.p., 2016. Web. 29 Jun. 2022. <https://thesaurus.plus/related/after/prior_to>.
Prior to or After. 2016. Accessed June 29, 2022. https://thesaurus.plus/related/after/prior_to.
Google Ngram Viewer shows how "after" and "prior to" have occurred on timeline