characteristic vs symptomatic

characteristic is a noun but symptomatic is not a noun.

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

characteristic (noun)	symptomatic (noun)
a distinguishing quality; a feature that can be used to identify something
any measurable property of a device measured under closely specified conditions
a prominent attribute or aspect of something
the integer part (positive or negative) of the representation of a logarithm; in the expression log 643 = 2.808 the characteristic is 2

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