tremble vs shiver

tremble and shiver both are nouns.

Word	Noun	Adjective	Verb	Adverb
tremble	Yes	No	Yes	No
shiver	Yes	No	Yes	No

As nouns, tremble and shiver are synonyms defined as:

tremble and shiver: a reflex motion caused by cold or fear or excitement

Other synonyms of tremble include shake.

As verbs, shiver is a hyponym of tremble; that is, shiver is a word with a more specific, narrower meaning than tremble:

Other hyponyms of tremble include shudder, thrill, throb, palpitate, quake, quiver.

tremble (noun)	shiver (noun)
a reflex motion caused by cold or fear or excitement	a reflex motion caused by cold or fear or excitement
	an almost pleasurable sensation of fright

tremble (verb)	shiver (verb)
move or jerk quickly and involuntarily up and down or sideways	shake, as from cold
	tremble convulsively, as from fear or excitement