There are 12 words that start with 'denatu'.
| denature | denatured | 
| denatures | denaturant | 
| denaturing | denaturants | 
| denaturalize | denaturation | 
| denaturalized | denaturalizes | 
| denaturations | denaturalizing | 
Note: These 12 words that start with 'denatu' are found from the USA & Canada version of the tournament Scrabble word list.