catatonia vs catatonic

catatonia is a noun but catatonic is not a noun.

Word	Noun	Adjective	Verb	Adverb
catatonia	Yes	No	No	No
catatonic	No	Yes	No	No

catatonia (noun)	catatonic (noun)
a form of schizophrenia characterized by a tendency to remain in a fixed stuporous state for long periods; the catatonia may give way to short periods of extreme excitement
extreme tonus; muscular rigidity; a common symptom in catatonic schizophrenia

catatonia (adjective)	catatonic (adjective)
	characterized by catatonia especially either rigidity or extreme laxness of limbs