back up Synonyms

back off back support pull back bear out go back withdraw vindicate verify validate uphold sustain substantiate strengthen store stand-by back down give one's support to attest to bear witness to stick up for stand behind side with go backwards aid and abet vouch for move backwards buoy up clog up choke off move back draw back spare second save encourage defend corroborate congest confirm clog choke champion certify bolster backing authenticate assist approve endorse