categorized vs classified

categorized is not a noun while classified is a noun.

Word	Noun	Adjective	Verb	Adverb
categorized	No	Yes	No	No
classified	Yes	Yes	No	No

categorized (noun)	classified (noun)
	a short ad in a newspaper or magazine (usually in small print) and appearing along with other ads of the same type

categorized (adjective)	classified (adjective)
arranged into categories	arranged into classes
	official classification of information or documents; withheld from general circulation