There are 15 words that start with 'posta'.
| postal | postage |
| postals | postages |
| postally | postanal |
| postaxial | postarrest |
| postatomic | postattack |
| postabortion | postaccident |
| postadolescent | postamputation |
| postapocalyptic | |
Note: These 15 words that start with 'posta' are found from the USA & Canada version of the tournament Scrabble word list.