Nouns

(n)reversala change from one state to the opposite state“there was a reversal of autonomic function”
(n)reverse, reversal, setback, blow, black eyean unfortunate happening that hinders or impedes; something that is thwarting or frustrating
(n)reversal, turn aroundturning in an opposite direction or position“the reversal of the image in the lens”
(n)reversal, change of mind, flip-flop, turnabout, turnarounda decision to reverse an earlier decision
(n)reversala judgment by a higher court that the judgment of a lower court was incorrect and should be set aside
(n)reversion, reverse, reversal, turnabout, turnaroundturning in the opposite direction
(n)transposition, reversalthe act of reversing the order or place of
(n)about-face, volte-face, reversal, policy changea major change in attitude or principle or point of view“an about-face on foreign policy”