There are 5 13-letter words that start with 'mod'.
| moderatorship | modernisation | 
| modernization | modifiability | 
| modifications | |
Note: These 5 13-letter words that start with 'mod' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with mode, modi, modu, moda, mods.
4-letter words start with 'mod' (3)