There are 14 words that start with 'porti'.
| portico | porting | portion | 
| porticos | portiere | portions | 
| porticoed | porticoes | portieres | 
| portioned | portioner | portioners | 
| portioning | portionless | |
Note: These 14 words that start with 'porti' are found from the USA & Canada version of the tournament Scrabble word list.