hock feign vouch cross heart ensure assent affiance take an oath betroth cinch okay predicate get off chest warrant string along own up pronounce vow underwrite confess say so testify covenant croon avouch acknowledge confirm spout pretend soapbox secure ice make out bargain certify asseverate bind come out talk big act as if stipulate declare obligate assure live up to set allege pledge consent insure mortgage spiel affirm pass profess get on soapbox admit clinch put on ice allow dissemble asservate compact commit state contract own sing fake claim swear grant attest witness lock up maintain swear up and down undertake agree cross one's heart insist announce engage ratify depose subscribe assert guarantee aver blow hot air open up pawn concede avow answer for Constate accede rubber-stamp nail down espouse have a lock on repeat purport stump plight proclaim