attest to

accept agree defend endorse recognize support

accede acquiesce allow approve certify grant own ratify uphold yield

defer to subscribe to take an oath

contradict decline deny disagree disapprove dispute oppose protest refuse reject renounce

condemn disallow disavow invalidate veto

abjure disregard forswear ignore repudiate

affirm confirm corroborate debunk demonstrate justify prove ratify validate verify

actualize approve authenticate complete establish incarnate manifest materialize objectify personify realize reify support test try

bear out check out check up try on try out

contradict deny discredit disprove invalidate reject veto

disapprove ignore neglect oppose refuse

break

affirm assert asseverate assure avert avow back certify confirm contend corroborate cosign declare guarantee maintain okay predicate profess prove sponsor substantiate support testify uphold verify vow warrant witness

act as a witness answer for be responsible for bear testimony get behind give an affidavit put forth rubber-stamp say so sign for stand up for swear to swear up and down

break condemn contradict deny desert disapprove disavow disclaim discourage discredit disprove invalidate neglect oppose refuse refute reject repudiate veto

renounce