scary vs chilling

scary is not a noun while chilling is a noun.

Word	Noun	Adjective	Verb	Adverb
scary	No	Yes	No	No
chilling	Yes	Yes	No	No

As adjectives, scary and chilling are synonyms defined as:

Other synonyms of scary include shivery, shuddery.

scary (noun)	chilling (noun)
	the process of becoming cooler; a falling temperature

scary (adjective)	chilling (adjective)
provoking fear or terror	provoking fear or terror