There are 12 words that start with 'metac'.
| metacarpi | metacarpal |
| metacarpus | metacenter |
| metacarpals | metacenters |
| metacentric | metacentrics |
| metacercaria | metacercariae |
| metacercarial | metachromatic |
Note: These 12 words that start with 'metac' are found from the USA & Canada version of the tournament Scrabble word list.