9-Letter Word Game

endoscope

dispenser

despising

supersize

kibitzers

reactions

Oh, blitzkrieg would have been a good one!!! Not sure how to add a follow up word to that one!!

Streamer

treatment

translate

Good one ceanna! Makes me wish isosceles works. 🙂

But since it would require too many letters to be changed, let's go with signature!

sparkling

sprinkler

turnpikes

persimmon

simmering