goosebump vs reflex

goosebump and reflex both are nouns.

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

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

goosebump: 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

goosebump (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

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