grouping vs sorting

grouping and sorting both are nouns.

Word	Noun	Adjective	Verb	Adverb
grouping	Yes	No	No	No
sorting	Yes	No	No	No

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

grouping (noun)	sorting (noun)
any number of entities (members) considered as a unit	grouping by class or kind or size
the activity of putting things together in groups	the basic cognitive process of arranging into classes or categories
a system for classifying things into groups	an operation that segregates items into groups according to a specified criterion