chill vs cast down

chill is a noun but cast down is not a noun.

Word	Noun	Adjective	Verb	Adverb
chill	Yes	No	Yes	No
cast down	No	No	Yes	No

As verbs, cast down is a hypernym of chill; that is, cast down is a word with a broader meaning than chill:

Other hypernyms of chill include deject, demoralise, demoralize, depress, dismay, dispirit, get down.

chill (noun)	cast down (noun)
coldness due to a cold environment
a sudden numbing dread
an almost pleasurable sensation of fright
a sensation of cold that often marks the start of an infection and the development of a fever

chill (verb)	cast down (verb)
loose heat	lower someone's spirits; make downhearted
make cool or cooler
depress or discourage