| A | B |
| con 1 | against; on the negative side |
| con 2 | opposing argument; reason against |
| contraband | merchandise imported or exported contrary to law; smuggled goods |
| contravene | go or act contrary to; violate; disregard, infringe |
| controversy | turning against, dispute; debate, quarrel |
| counter | contrary; in the opposite direction |
| countermand | cancel (an order) by issuing a contrary order |
| incontrovertible | not able to be 'turned against' or distinguished; unquestionable; certain; indisputable |