There are 14 words that start with 'prepos'.
| prepossess | preposition |
| prepositive | prepositions |
| prepossessed | prepossesses |
| preposterous | prepositional |
| prepositively | prepossessing |
| prepossession | prepossessions |
| preposterously | prepositionally |
Note: These 14 words that start with 'prepos' are found from the USA & Canada version of the tournament Scrabble word list.