oops! i just stumbled upon a good one!
signore
ignore*(ok, its not perfect.. you have to take off the i and g)
nore
ore
re

but
schilling
chilling
hilling


and
shallow
hallow
allow
(low)


and
stray
tray
ray
is that a repeat? then strap..

and
strick
trick
rick
ick


and the sw/sm/sc
swarm
warm
arm

smart
mart
art

and
scowl
cowl
owl

and

stripe
tripe
ripe

and finally
shire
hire
ire
re

or would you prefer i turn my mind to limericks?