Nouns:
* Postcard: A card for sending messages through the mail.
* Postman/Postwoman: A person who delivers mail.
* Postoffice: A building where mail is sorted and distributed.
* Postscript: A note added after the end of a letter or document.
* Postmortem: An examination of a dead body to determine the cause of death.
* Postgraduate: A student who continues their education after a bachelor's degree.
* Postgraduate: A student who continues their education after a bachelor's degree.
* Post-it: A small, sticky note for writing messages.
* Post-war: The time period after a war.
* Post-game: The activities that take place after a game.
Verbs:
* Postpone: To delay something until a later time.
* Postdate: To put a later date on something.
* Post-process: To edit or modify something after it has been created.
Adjectives:
* Post-traumatic: Relating to psychological trauma after a traumatic event.
Other:
* Post-op: Short for postoperative, referring to the time period after surgery.
* Post-punk: A subgenre of rock music that emerged after punk rock.
This is not an exhaustive list, but it gives you a good starting point. There are many other compound words with "post" in them, depending on the specific context.