There are 9 11-letter words that end with 'pper'.
| backslapper | grasshopper | handicapper | 
| hedgehopper | gallinipper | showstopper | 
| sidestepper | teenybopper | woodchopper | 
Note: These 9 11-letter words that end with 'pper' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words end with apper, opper, ipper, upper, epper, ypper.
5-letter words end with 'pper' (1)