afford hope and candle ascertain assert assert under oath asseverate attest augur well avouch back be convincing be sponsor for bear up bid fair bolster bond book brace up bring home to bring over bring round bring to reason buck up carry conviction certify cheer cinch clear up clinch comfort condole with confirm console convert convict convince countersecure countersign decide depone depose determine dismiss all doubt drive home to ease embolden encourage endorse ensure establish find out fix get at give comfort give hope guarantee guaranty have good prospects hearten hold out hope hold out promise inspire inspire belief inspire hope inspirit insure justify hope kiss the book lead to believe make a promise make certain make fair promise make no doubt make no mistake make sure make sure of nail down nerve persuade pledge plight promise put at ease raise expectations raise hope reassure relieve remove all doubt satisfy secure see that see to it sell sell one on set at ease set at rest settle sign sign for solace sort out sponsor stabilize stand behind stand up for state subscribe to support swear swear by bell swear the truth swear to swear to God swear to goodness sympathize with talk over testify troth undersign underwrite vouch vow warrant win over