reversal vs reordering

reversal and reordering both are nouns.

Word	Noun	Adjective	Verb	Adverb
reversal	Yes	No	No	No
reordering	Yes	No	No	No

As nouns, reordering is a hypernym of reversal; that is, reordering is a word with a broader meaning than reversal:

reversal (noun)	reordering (noun)
a change from one state to the opposite state	a rearrangement in a different order
the act of reversing the order or place of
turning in the opposite direction
a major change in attitude or principle or point of view
a judgment by a higher court that the judgment of a lower court was incorrect and should be set aside
a decision to reverse an earlier decision
turning in an opposite direction or position
an unfortunate happening that hinders or impedes; something that is thwarting or frustrating