1postdate
comes after the real date
2postgraduate
take a class after one who has already graduated
3posthumous
after death (author)
4postindustrial
after the Industrial Revolution
5postmark
stamp after received by post office
6postmeridian
after noon; PM
7postmortem
done after death (examination)
8postpone
a date after originally planned
9postproduction
done after movie, film, or video has been taped
10postscript
note written after a letter is finished