There are 13 words that start with 'poster'.
| poster | postern |
| posters | posterns |
| posterior | posterity |
| posteriors | posteriorly |
| posterities | posteriority |
| posteruptive | posteriorities |
| posterolateral | |
Note: These 13 words that start with 'poster' are found from the USA & Canada version of the tournament Scrabble word list.