There are 18 words that start with 'puf'.
puff | puffs | puffy |
puffed | puffer | puffin |
puffers | puffery | puffier |
puffily | puffing | puffins |
puffball | puffiest | puffballs |
pufferies | puffiness | puffinesses |
Note: These 18 words that start with 'puf' are found from the USA & Canada version of the tournament Scrabble word list.