abate
abolish
abrogate
annihilate
annul
avoid
belie
blow sky-high
blow up
bring to naught
bring to nothing
buffer
cancel
cancel out
come to nothing
counterbalance
countermand
counterorder
deflate
disannul
disconfirm
discredit
disprove
disqualify
do away with
explode
expose
frustrate
infirm
invalid
make void
negate
negativate
negative
neutralize
nullify
offset
override
overrule
overthrow
prove the contrary
puncture
quash
alter
change
contradict
mark
modify
score
invalidated
invalidates
invalidating
confirm