chill vs shudder

chill and shudder both are nouns.

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

As nouns, chill and shudder are synonyms defined as:

Other synonyms of chill include frisson, quiver, shiver, thrill, tingle.

chill (noun)	shudder (noun)
coldness due to a cold environment	an involuntary vibration (as if from illness or fear)
a sudden numbing dread	an almost pleasurable sensation of fright
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)	shudder (verb)
loose heat	shake, as from cold
make cool or cooler	tremble convulsively, as from fear or excitement
depress or discourage