There are 16 words that start with 'sket'.
| sketch | sketchy | 
| sketched | sketcher | 
| sketches | sketchers | 
| sketchier | sketchily | 
| sketching | sketchpad | 
| sketchbook | sketchiest | 
| sketchpads | sketchbooks | 
| sketchiness | sketchinesses | 
Note: These 16 words that start with 'sket' are found from the USA & Canada version of the tournament Scrabble word list.