There are 8 words that start with 'myoc'.
| myocardia | myoclonic | 
| myoclonus | myocardial | 
| myocardium | myocarditis | 
| myoclonuses | myocarditises | 
Note: These 8 words that start with 'myoc' are found from the USA & Canada version of the tournament Scrabble word list.