reordering vs shuffling

reordering and shuffling both are nouns.

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

As nouns, shuffling is a hyponym of reordering; that is, shuffling is a word with a more specific, narrower meaning than reordering:

Other hyponyms of reordering include permutation, reversal, transposition, overtaking, passing, make, shuffle.

reordering (noun)	shuffling (noun)
a rearrangement in a different order	the act of mixing cards haphazardly
	walking with a slow dragging motion without lifting your feet