cross-examination;  retort;  asking in return
 opposition;  resistance;  antagonism;  reverse;  opposite;  inverse
 foul play (sport);  breaking the rules;  infringement;  irregularity
 rolling over;  turning over;  turning around (the other way);  reversal (of direction, course, etc.);  producing a positive from a negative (photography);  producing a negative from a positive
 treason;  treachery;  mutiny;  rebellion;  insurrection
 rumination;  regurgitation;  chewing the cud;  turning over in one's mind;  thinking over something;  pondering
 estrangement;  alienation;  disaffection
 objection;  refutation;  rebuttal;  counterargument
 reflection;  reverberation;  reflex;  reflexes
 reaction;  recoil;  kick;  backlash
 insurrection;  mutiny;  rebellion;  revolt;  uprising
 opposition;  resistance;  insubordination;  defiance;  hostility;  rebellion
 opposite side;  reverse;  (on the) other hand
 antipathy;  antagonism;  animosity;  revulsion;  ill feeling
 refutation;  rebuttal;  retort
 proof to the contrary;  disproof;  counter-evidence;  rebuttal;  refutation
 enmity;  antagonism;  hostility
 inversion;  opposition;  conflicting;  repulsion;  contradiction
 antisocial;  contrary to public order or morality;  offensive;  sociopathic;  immoral;  obscene
 irony;  rhetorical question
 counterclockwise;  anti-clockwise
 anti-mainstream faction;  fringe group;  dissident group
 anti-fascism;  antifascism
 anti-establishment;  anti-government
 recurrent laryngeal nerve;  recurrent nerve
 counterexample;  counter-example
 counterfactual thinking;  counterfactual assumption;  counterfactual supposition
 opposition to whaling;  anti-whaling
 anti-nuclear power movement;  antinuclear power movement
 antisocial personality disorder
 translation;  back translation;  transcription (of shorthand to longhand);  deciphering (a code)
 additive inverse;  opposite number;  reciprocal number
 (in philosophy) thesis-antithesis-synthesis
 anti-globalization;  anti-globalisation
 fanqie;  traditional Chinese spelling system in which two characters are used: the first one for the onset, the second one for rhyme and tone
 anti-money laundering law
 anticompetitive behaviour;  anticompetitive behavior;  anticompetitive practice
 palpebral nerve;  palpebral entropion;  entropion of the eyelids