There are 11 words that start with 'menst'.
| menstrua | menstrual |
| menstruum | menstruate |
| menstruums | menstrually |
| menstruated | menstruates |
| menstruating | menstruation |
| menstruations | |
Note: These 11 words that start with 'menst' are found from the USA & Canada version of the tournament Scrabble word list.