cover for

advocate argue assert back champion endorse explain guarantee justify maintain stand by support uphold

aid befriend espouse exculpate exonerate plead rationalize recommend second stonewall sustain vindicate warrant

apologize for back up bear one out come to defense of go to bat for prove a case put in a good word ride shotgun for say in defense speak up for stand up for stick up for thump for

oppose protest reject

accuse blame condemn

abandon attack deny forsake relinquish renounce

back up defend endorse go to the wall for recommend stand behind stand by stand up for stick up for support

act for alternate answer for back up be in place of change commute deputize displace do the work of double for fill in fill in for fill one's position go as proxy relieve replace serve in one's stead spell stand for stand in stand in for sub supersede supplant supply swap swap places with switch take another's place take over

replace supplant swap

alternate change commute deputize displace proxy relieve spell sub supersede switch

act for answer for back up be in place of do the work of double for fill in for fill one's position go as serve in one's stead stand for stand in (for) swap places with take another's place take over

continue keep