shiver vs innate reflex

shiver and innate reflex both are nouns.

Word	Noun	Adjective	Verb	Adverb
shiver	Yes	No	Yes	No
innate reflex	Yes	No	No	No

As nouns, innate reflex is a hypernym of shiver; that is, innate reflex is a word with a broader meaning than shiver:

shiver (noun)	innate reflex (noun)
a reflex motion caused by cold or fear or excitement	an automatic instinctive unlearned reaction to a stimulus
an almost pleasurable sensation of fright

shiver (verb)	innate reflex (verb)
shake, as from cold
tremble convulsively, as from fear or excitement