Horripilation and Unconditioned reflex

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

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

Unconditioned reflex noun - An automatic instinctive unlearned reaction to a stimulus.

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