There are 16 words that end with 'nniest'.
| bonniest | canniest | funniest |
| ginniest | fenniest | finniest |
| runniest | punniest | sunniest |
| tinniest | wenniest | branniest |
| skinniest | whinniest | squinniest |
| uncanniest | ||
Note: These 16 words that end with 'nniest' are found from the USA & Canada version of the tournament Scrabble word list.