There are 10 words that end with 'napper'.
| napper | knapper | 
| snapper | catnapper | 
| dognapper | kidnapper | 
| schnapper | petnapper | 
| snippersnapper | whippersnapper | 
Note: These 10 words that end with 'napper' are found from the USA & Canada version of the tournament Scrabble word list.