symptomatic vs symptom

symptomatic is not a noun while symptom is a noun.

Word	Noun	Adjective	Verb	Adverb
symptomatic	No	Yes	No	No
symptom	Yes	No	No	No

symptomatic (noun)	symptom (noun)
	anything that accompanies X and is regarded as an indication of X's existence
	(medicine) any sensation or change in bodily function that is experienced by a patient and is associated with a particular disease

symptomatic (adjective)	symptom (adjective)
relating to or according to or affecting a symptom or symptoms
characteristic or indicative of a disease