There are 10 words that start with 'vaci'.
| vacillant | vacillate |
| vacillated | vacillates |
| vacillator | vacillating |
| vacillation | vacillators |
| vacillations | vacillatingly |
Note: These 10 words that start with 'vaci' are found from the USA & Canada version of the tournament Scrabble word list.