RichThesaurus
validate
validate
synonyms
confirm
ratify
endorse
verify
corroborate
approve
support
sanction
substantiate
authenticate
certify
prove
authorize
bear out
warrant
uphold
justify
establish
demonstrate
license
accept
agree to
accredit
OK
legalize
consent to
permit
back up
vindicate
back
attest to
show
pass
document
attest
give the OK to
give the thumbs up to
sustain
rubber-stamp
give the green light to
affirm
testify to
give credence to
manifest
determine
legitimize
vouch for
guarantee
show to be true
formalize
more synonyms
validate
antonyms
invalidate
annul
revoke
nullify
void
negate
abrogate
veto
rescind
disprove
repeal
quash
reject
abolish
contradict
reverse
cancel
undo
refuse
vacate
repudiate
deny
countermand
refute
overturn
retract
render invalid
discredit
neutralize
vitiate
wipe out
render null and void
undermine
abate
annihilate
set aside
disallow
forbid
overthrow
recall
overrule
weaken
withdraw
kill
terminate
declare null and void
nix
break
scrub
dissolve
more antonyms