There are 12 words that start with 'viscou'.
| viscous | viscount |
| viscounts | viscounty |
| viscously | viscountcy |
| viscountess | viscounties |
| viscousness | viscountcies |
| viscountesses | viscousnesses |
Note: These 12 words that start with 'viscou' are found from the USA & Canada version of the tournament Scrabble word list.