KO
conclusive argument
coup de grace
crusher
death stroke
deathblow
end-all
ender
final stroke
finisher
finishing stroke
floorer
kayo
kayo punch
knockdown argument
knockout
knockout blow
last dab
quietus
settle
settler
sockdolager
stopper
trump
argument
causal factor
determinant
determinative
determiner
determining factor
statement
tool
Ewan
body-hair
crapshoot
diffendarfer
find
flame-out
isabout
large-headed
lawn tennis
mass-ratio
moonbat
red-lacquered
rollover
sixpenny
tailwind
talon-like
tenpenny
terroriststrike
two-inch-long
white-rimmed
pincher