There are 11 14-letter words that start with 'sl'.
| slanderousness | slatternliness |
| slaughterhouse | slaughterously |
| sledgehammered | slipperinesses |
| slothfulnesses | slovenlinesses |
| sluggardnesses | sluggishnesses |
| sluttishnesses | |
Note: These 11 14-letter words that start with 'sl' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with sli, sla, sle, slo, slu, sly.
3-letter words start with 'sl' (1)