There are 11 words that start with 'carbox'.
| carboxyl | carboxyls |
| carboxylic | carboxylase |
| carboxylate | carboxylases |
| carboxylated | carboxylates |
| carboxylating | carboxylation |
| carboxylations | |
Note: These 11 words that start with 'carbox' are found from the USA & Canada version of the tournament Scrabble word list.