Hmm, stupor's a tough one.
The Letter Game 2: LONG words
CheeseRooky, you can't go from "sprouts" to "stupors." If this was the Letter Game 3, then you could, since "stupors" is an anagram of "sprouts." This is the Letter Game 2 though, and we are not rearranging letters, but adding letters then if we can't, changing or subtracting letters. 
from "sprouts"
scouts (I dropped a letter and changed a letter since it was hard)

stupors
wow u went from "sprouts" to "stupors?" that's a 5 letter change & switch! lol guess ur throw'n away the rules
stupor