have
havest
hadst
has
Nast
aghast
amassed
asked
ast
bast
blast
cast
caste
classed
contrast
fast
gassed
gast
glassed
grassed
harassed
kast
lambaste
last
lymphoblast
massed
mast
miscast
outlast
passed
past
precast
recast
surpassed
unsurpassed
vast