backs
词形变化：
形容词: backless | 动词过去式: backed | 动词过去分词: backed | 动词现在分词: backing | 动词第三人称单数: backs |
同义词：
rear | behind | hind | backwards | backbone | spine | vertebrae | support | recede | reverse | backward | vertebral column | spinal column | back up | spinal | encourage | sponsor | succour | help | sustain | second | patronize | boost | favour | aid | assist | abet | uphold | subsidize | promote | countenance | maintain | bolster | certify | validate | corroborate | attest | go | end | buttocks | stern | substantiate | heel | rump | confirm | to | backside | breech | hind-quarters | fundament | posterior | return | rebound | tail end | ebb | retrogress | recoil | backtrack | retrocede | retreat | revert | tail | regress | bat | go to bat for | for | stand | stand behind | hinder | back down | endorse | down | indorse | go backwards | turn tail | prior | ago | backrest | since | rachis | binding | punt | heretofore | stake | back | turn | rearward | plump for | removed | bygone | dorsum | gage | distant | remote | former | past | obsolete | plunk for | earlier | faraway | the | cover | dated | secluded | elapsed | out-of-the-way | late | outermost | hindmost | last | bet on | game | previous | rural | rearwards | advocate | side | guarantee | finance | ridge | befriend | favor | insure | early | or | forward | ward | forwards |
反义词：