pilomotor reflex vs horripilation

pilomotor reflex and horripilation both are nouns.

Word	Noun	Adjective	Verb	Adverb
pilomotor reflex	Yes	No	No	No
horripilation	Yes	No	No	No

As nouns, pilomotor reflex and horripilation are synonyms defined as:

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

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

pilomotor reflex (noun)	horripilation (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