There are 17 words that start with 'posts'.
| posts | postshow |
| postsync | postsyncs |
| postscript | postseason |
| poststrike | postsynced |
| postscripts | postseasons |
| postsyncing | poststimulus |
| postsurgical | postsynaptic |
| postsecondary | poststimulation |
| poststimulatory | |
Note: These 17 words that start with 'posts' are found from the USA & Canada version of the tournament Scrabble word list.