There are 15 words that start with 'influ'.
| influx | influent | 
| influxes | influence | 
| influents | influenza | 
| influenced | influences | 
| influenzal | influenzas | 
| influencing | influential | 
| influentials | influenceable | 
| influentially | |
Note: These 15 words that start with 'influ' are found from the USA & Canada version of the tournament Scrabble word list.