I can't seem to figure it out, but here are some words that can come from it:

side
pacifists
preferred
deceases
decease
escapes
escape
referred
sadistic
coasts
adopt
case
casts
costs
factor
fasts
pasts
posts
scats
scops
soaps
sodas
sofas
spots
stops
tea
ate
eat
pot
pots
pass
refer
pieces
pat
pats
part
parts
cat
cats
cot
cots


yea...

and i got these words...but there are more on this website, but you gotta type in the letters that you want the words from...

http://wordscramblesolver.net/

Three words would be : FIASCO, RID and PESTERER