There are 15 words that start with 'propos'.
| propose | proposal |
| proposed | proposer |
| proposes | proposals |
| proposers | proposing |
| propositi | propositus |
| proposition | propositions |
| propositional | propositioned |
| propositioning | |
Note: These 15 words that start with 'propos' are found from the USA & Canada version of the tournament Scrabble word list.