There are 13 words that start with 'nif'.
| nifty | niffer | niffers |
| niftier | nifties | niftily |
| niffered | niftiest | niffering |
| niftiness | nifedipine | nifedipines |
| niftinesses | ||
Note: These 13 words that start with 'nif' are found from the USA & Canada version of the tournament Scrabble word list.