There are 14 words that start with 'herba'.
| herbal | herbage | herbals | 
| herbaged | herbages | herbaria | 
| herbalism | herbalist | herbarial | 
| herbarium | herbaceous | herbalisms | 
| herbalists | herbariums | |
Note: These 14 words that start with 'herba' are found from the USA & Canada version of the tournament Scrabble word list.