There are 4 13-letter words that start with 'off'.
| offensiveness | offhandedness |
| officeholders | officiousness |
Note: These 4 13-letter words that start with 'off' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with offi, offe, offs, offh, offl, offc, offp, offa, offb, offr, offk, offt.
4-letter words start with 'off' (1)