There are 7 14-letter words that start with 'exc'.
| exceptionalism | exceptionality | 
| excitabilities | excommunicated | 
| excommunicates | excommunicator | 
| excruciatingly | |
Note: These 7 14-letter words that start with 'exc' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with exce, exci, excl, excr, excu, exco, exca, exch.
5-letter words start with 'exc' (1)