refrigeration vs chilling

refrigeration and chilling both are nouns.

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

As nouns, chilling is a hypernym of refrigeration; that is, chilling is a word with a broader meaning than refrigeration:

refrigeration: the process of cooling or freezing (e.g., food) for preservative purposes
chilling: the process of becoming cooler; a falling temperature

Other hypernyms of refrigeration include cooling, temperature reduction, preservation.

refrigeration (noun)	chilling (noun)
deliberately lowering the body's temperature for therapeutic purposes	the process of becoming cooler; a falling temperature
the process of cooling or freezing (e.g., food) for preservative purposes

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