shudder vs thrill

shudder and thrill both are nouns.

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

As nouns, shudder and thrill are synonyms defined as:

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

As verbs, shudder and thrill are synonyms defined as:

Other synonyms of shudder include shiver, throb.

shudder (noun)	thrill (noun)
an involuntary vibration (as if from illness or fear)	something that causes you to experience a sudden intense feeling or sensation
an almost pleasurable sensation of fright	the swift release of a store of affective force
	an almost pleasurable sensation of fright

shudder (verb)	thrill (verb)
shake, as from cold	fill with sublime emotion
tremble convulsively, as from fear or excitement	feel sudden intense sensation or emotion
	tremble convulsively, as from fear or excitement
	cause to be thrilled by some perceptual input