There are 11 words that start with 'longi'.
| longies | longing | 
| longish | longings | 
| longicorn | longingly | 
| longitude | longicorns | 
| longitudes | longitudinal | 
| longitudinally | |
Note: These 11 words that start with 'longi' are found from the USA & Canada version of the tournament Scrabble word list.