gooseflesh vs reflex action

gooseflesh and reflex action both are nouns.

Word	Noun	Adjective	Verb	Adverb
gooseflesh	Yes	No	No	No
reflex action	Yes	No	No	No

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

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

gooseflesh (noun)	reflex action (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