There are 11 words that start with 'diaste'.
| diastem | diaster |
| diastema | diastems |
| diasters | diastemas |
| diastemata | diastereomer |
| diastereomers | diastereomeric |
| diastereoisomer | |
Note: These 11 words that start with 'diaste' are found from the USA & Canada version of the tournament Scrabble word list.