There are 11 words that start with 'concoc'.
| concoct | concocts | concocted |
| concocter | concoctor | concocters |
| concocting | concoction | concoctive |
| concoctors | concoctions | |
Note: These 11 words that start with 'concoc' are found from the USA & Canada version of the tournament Scrabble word list.