There are 8 13-letter words that start with 'sl'.
| slaveholdings | slavishnesses |
| sledgehammers | sleeplessness |
| slendernesses | slipstreaming |
| slouchinesses | slumpflations |
Note: These 8 13-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)