There are 5 15-letter words that start with 'unf'.
| unfamiliarities | unfavorableness |
| unfeelingnesses | unforgivingness |
| unfossiliferous | |
Note: These 5 15-letter words that start with 'unf' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with unfa, unfo, unfe, unfr, unfi, unfl, unfu.
5-letter words start with 'unf' (3)