There are 15 words that start with 'choc'.
| chock | chocks | chocked | 
| chockful | chocking | chockfull | 
| chocolate | chocolaty | chocoholic | 
| chocolates | chocolatey | chockablock | 
| chocoholics | chocolatier | chocolatiers | 
Note: These 15 words that start with 'choc' are found from the USA & Canada version of the tournament Scrabble word list.