radiological vs radiology

radiological is not a noun while radiology is a noun.

Word	Noun	Adjective	Verb	Adverb
radiological	No	Yes	No	No
radiology	Yes	No	No	No

radiological (noun)	radiology (noun)
	(radiology) examination of the inner structure of opaque objects using X rays or other penetrating radiation
	the branch of medical science dealing with the medical use of X-rays or other penetrating radiation

radiological (adjective)	radiology (adjective)
of or relating to radiology