"reversal" - key terms from Wikipedia

ad populum reversal
aileron reversal
audio reversal
cold reversal
color reversal
course reversal
field reversal
geomagnetic reversal
habit reversal
phonetic reversal
polarity reversal
rank reversal
reversal
reversal film
reversal jewel
reversal of attainder
reversal of content
reversal of fortune
reversal potential
risk reversal
role reversal
stress reversal
sudden block of flow reversal
time reversal
tubal reversal
vasectomy reversal