There are 15 words that start with 'invert'.
| invert | inverts | 
| inverted | inverter | 
| invertin | invertor | 
| invertase | inverters | 
| inverting | invertins | 
| invertors | invertases | 
| invertible | invertebrate | 
| invertebrates | |
Note: These 15 words that start with 'invert' are found from the USA & Canada version of the tournament Scrabble word list.