There are 12 words that start with 'lacer'.
| lacer | lacers | lacerate | 
| lacertid | lacerable | lacerated | 
| lacerates | lacertids | lacerating | 
| laceration | lacerative | lacerations | 
Note: These 12 words that start with 'lacer' are found from the USA & Canada version of the tournament Scrabble word list.