sort vs classify

sort is a noun but classify is not a noun.

Word	Noun	Adjective	Verb	Adverb
sort	Yes	No	Yes	No
classify	No	No	Yes	No

As verbs, sort and classify are synonyms defined as:

Other synonyms of sort include assort, class, separate, sort out.

sort (noun)	classify (noun)
an approximate definition or example
a category of things distinguished by some common characteristic or quality
a person of a particular character or nature
an operation that segregates items into groups according to a specified criterion

sort (verb)	classify (verb)
arrange or order by classes or categories	arrange or order by classes or categories
examine in order to test suitability	assign to a class or kind
	declare unavailable, as for security reasons