goose bump vs reflex

goose bump and reflex both are nouns.

Word	Noun	Adjective	Verb	Adverb
goose bump	Yes	No	No	No
reflex	Yes	Yes	No	No

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

goose bump: 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

goose bump (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

goose bump (adjective)	reflex (adjective)
	without volition or conscious control