There are 12 words that start with 'gramm'.
| gramma | gramme |
| grammar | grammas |
| grammes | grammars |
| grammarian | grammarians |
| grammatical | grammatically |
| grammaticality | grammaticalness |
Note: These 12 words that start with 'gramm' are found from the USA & Canada version of the tournament Scrabble word list.