shudder vs chill

shudder and chill both are nouns.

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

As nouns, shudder and chill are synonyms defined as:

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

shudder (noun)	chill (noun)
an involuntary vibration (as if from illness or fear)	coldness due to a cold environment
an almost pleasurable sensation of fright	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

shudder (verb)	chill (verb)
shake, as from cold	loose heat
tremble convulsively, as from fear or excitement	make cool or cooler
	depress or discourage