affirms

assert confirm declare guarantee insist maintain profess ratify repeat

asseverate attest aver avouch avow certify cinch clinch ice okay predicate pronounce set state swear testify vouch witness

cross heart have a lock on lock up nail down put on ice rubber-stamp say so swear on bible swear up and down

deny forget veto

disavow refute reject renounce repudiate

negate nullify