You can only change ONE letter, AND/OR rearrange the letters currently available. The first word is:
WINS
fork
rock
rook
poor
polo
cool
look
cook
kook
sook
soot
shoo
gosh
shop
host
shit
*hands gesine the toilet paper*
ship
hasp
gasp
@Christine - It's always amazing what women have in their handbags :)
--Michael
spat
salt
slat
tale
tall