There are 16 words that start with 'emph'.
| emphases | emphasis | 
| emphatic | emphasise | 
| emphasize | emphysema | 
| emphasised | emphasises | 
| emphasized | emphasizes | 
| emphysemas | emphysemic | 
| emphasising | emphasizing | 
| emphatically | emphysematous | 
Note: These 16 words that start with 'emph' are found from the USA & Canada version of the tournament Scrabble word list.