| back | (verb) establish as valid or genuine | Synonyms: back up |
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| (verb) strengthen by providing with a back or backing | - |
| (verb) shift to a counterclockwise direction | - |
| (verb) place a bet on | Synonyms: bet on, gage, game, punt, stake |
| (verb) travel backward | - |
| (verb) cause to travel backward | - |
| (verb) support financial backing for | - |
| (verb) be behind; approve of | Synonyms: endorse, indorse, plump for, plunk for, support |
| (verb) give support or one's approval to | Synonyms: endorse, indorse, second |
| (verb) be in back of | - |
| follback | (verb) to return someone's following of you on a social media platform | - |
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| fullback | (verb) play the fullback | - |
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| piggyback | (verb) bring into alignment with | - |
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| (verb) support on the back and shoulders | - |
| (verb) haul by railroad car | - |
| (verb) haul truck trailers loaded with commodities on railroad cars | - |
| (verb) ride on someone's shoulders or back | - |
| quarterback | (verb) play the quarterback | - |
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