There are 3 13-letter words that start with 'lac'.
| lackadaisical | lactobacillus |
| lactoglobulin | |
Note: These 3 13-letter words that start with 'lac' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with lact, lace, lack, lacq, lacu, laci, lach, lacr, laco, lacc, lacs, lacy.
4-letter words start with 'lac' (4)