There are 19 words that start with 'erra'.
| errand | errant | errata | 
| errable | errancy | errands | 
| errants | erratas | erratic | 
| erratum | errantly | errantry | 
| erratics | errancies | erratical | 
| errantries | erraticism | erratically | 
| erraticisms | ||
Note: These 19 words that start with 'erra' are found from the USA & Canada version of the tournament Scrabble word list.