There are 17 words that start with 'pretr'.
| pretrim | pretrain |
| pretreat | pretrial |
| pretrims | pretrains |
| pretravel | pretreats |
| pretrials | pretrained |
| pretreated | pretrimmed |
| pretraining | pretreating |
| pretrimming | pretreatment |
| pretreatments | |
Note: These 17 words that start with 'pretr' are found from the USA & Canada version of the tournament Scrabble word list.