Reversal
Part of speech: noun
Definition: The state of being reversed. An instance of reversing. A change in fortune; a change from being successful to having problems.
Example sentence: Californians want to have clean air, clean water - not like the Trump Administration is trying to do with its rollback of environmental regulations, like the reversal of the Clean Power Plan.
Transposition
Part of speech: noun
Definition: A shift of a piece of music to a different musical key by adjusting all the notes of the work equally either up or down in pitch.