There are 4 13-letter words that start with 'ske'.
| skeletonising | skeletonizers | 
| skeletonizing | sketchinesses | 
Note: These 4 13-letter words that start with 'ske' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with skel, sket, skew, skee, skep, sked, skei, skea, skeg, sken, sker.
4-letter words start with 'ske' (4)