There are 18 words that start with 'vacu'.
| vacua | vacuum |
| vacuity | vacuole |
| vacuous | vacuums |
| vacuolar | vacuoles |
| vacuumed | vacuities |
| vacuolate | vacuously |
| vacuuming | vacuolated |
| vacuolation | vacuousness |
| vacuolations | vacuousnesses |
Note: These 18 words that start with 'vacu' are found from the USA & Canada version of the tournament Scrabble word list.