RichThesaurus
vouch
vouch
synonyms
guarantee
affirm
confirm
swear
profess
declare
attest
testify
certify
vow
warrant
swear up and down
assert
state
maintain
avow
verify
say so
aver
covenant
corroborate
promise
pledge
undertake
plight
assure
okay
endorse
witness
pass
substantiate
agree
proclaim
rubber-stamp
contract
pronounce
validate
asseverate
predicate
allege
approve
avouch
authenticate
support
engage
swear on bible
cross heart
repeat
sign
vouchsafe
more synonyms
vouch
antonyms
deny
disavow
contradict
counteract
invalidate
break
negate
repudiate
veto
oppose
reject
disprove
punish
break off
cancel
nullify
disaffirm
annul
thumbs down
take on
destroy
break up
renege
negative
discredit
have bone to pick
decide
contravene
differ
falsify
retract
confront
challenge
gainsay
renounce
buck
belie
sentence
traverse
hide
cross
counter
call in question
conceal
void
impugn
refuse to accept
refute
dispute
dare
more antonyms