horripilation vs horripilate

horripilation is a noun but horripilate is not a noun.

Word	Noun	Adjective	Verb	Adverb
horripilation	Yes	No	No	No
horripilate	No	No	Yes	No

horripilation (noun)	horripilate (noun)
reflex erection of hairs of the skin in response to cold or emotional stress or skin irritation

horripilation (verb)	horripilate (verb)
	cause (someone's) hair to stand on end and to have goosebumps
	have one's hair stand on end and get goosebumps