Nast
aghast
amassed
ast
basked
bast
blast
cast
caste
classed
contrast
fast
gassed
gast
glassed
grassed
harassed
hast
kast
lambaste
last
lymphoblast
masked
massed
mast
miscast
outlast
passed
past
precast
recast
surpassed
tasked
unmasked
unsurpassed
vast