goose bump vs pilomotor reflex

goose bump and pilomotor reflex both are nouns.

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

As nouns, goose bump and pilomotor reflex are synonyms defined as:

goose bump and pilomotor reflex: reflex erection of hairs of the skin in response to cold or emotional stress or skin irritation

Other synonyms of goose bump include goose pimple, goose skin, goosebump, gooseflesh, horripilation.

goose bump (noun)	pilomotor reflex (noun)
reflex erection of hairs of the skin in response to cold or emotional stress or skin irritation	reflex erection of hairs of the skin in response to cold or emotional stress or skin irritation