There are 8 13-letter words that start with 'carb'.
| carbohydrases | carbohydrates | 
| carboniferous | carbonization | 
| carbonylation | carboxylating | 
| carboxylation | carburization | 
Note: These 8 13-letter words that start with 'carb' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with carbo, carbu, carba, carbi, carbs.
5-letter words start with 'carb' (2)