pilomotor reflex vs reflex

pilomotor reflex and reflex both are nouns.

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

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

pilomotor reflex: 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

pilomotor reflex (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

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