Horripilation and Reflex action

Horripilation noun - Reflex erection of hairs of the skin in response to cold or emotional stress or skin irritation.

Reflex action and horripilation are semantically related. In some cases you can use "Reflex action" instead a noun "Horripilation".

Reflex action noun - An automatic instinctive unlearned reaction to a stimulus.

Horripilation and reflex action are semantically related. Sometimes you can replace term "Horripilation" with "Reflex action", this terms are similar.