apprehension vs chill

apprehension and chill both are nouns.

Word	Noun	Adjective	Verb	Adverb
apprehension	Yes	No	No	No
chill	Yes	No	Yes	No

As nouns, chill is a hyponym of apprehension; that is, chill is a word with a more specific, narrower meaning than apprehension:

apprehension (noun)	chill (noun)
the act of apprehending (especially apprehending a criminal)	coldness due to a cold environment
the cognitive condition of someone who understands	a sudden numbing dread
painful expectation	an almost pleasurable sensation of fright
fearful expectation or anticipation	a sensation of cold that often marks the start of an infection and the development of a fever