There are 12 words that start with 'postma'.
| postman | postmark |
| postmarks | postmarked |
| postmaster | postmating |
| postmarital | postmarking |
| postmasters | postmastectomy |
| postmastership | postmasterships |
Note: These 12 words that start with 'postma' are found from the USA & Canada version of the tournament Scrabble word list.