There are 18 words that start with 'lunc'.
| lunch | lunched | 
| luncher | lunches | 
| lunchbox | luncheon | 
| lunchers | lunching | 
| luncheons | lunchmeat | 
| lunchroom | lunchtime | 
| lunchboxes | lunchmeats | 
| lunchrooms | lunchtimes | 
| luncheonette | luncheonettes | 
Note: These 18 words that start with 'lunc' are found from the USA & Canada version of the tournament Scrabble word list.