horripilation vs reflex

horripilation and reflex both are nouns.

Word	Noun	Adjective	Verb	Adverb
horripilation	Yes	No	No	No
reflex	Yes	Yes	No	No

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

horripilation: reflex erection of hairs of the skin in response to cold or emotional stress or skin irritation
reflex: an automatic instinctive unlearned reaction to a stimulus

horripilation (noun)	reflex (noun)
reflex erection of hairs of the skin in response to cold or emotional stress or skin irritation	an automatic instinctive unlearned reaction to a stimulus

horripilation (adjective)	reflex (adjective)
	without volition or conscious control