pilomotor reflex vs goose bump

pilomotor reflex and goose bump both are nouns.

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

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

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

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

pilomotor reflex (noun)	goose bump (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