Horripilation and Physiological reaction

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

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

Physiological reaction noun - An automatic instinctive unlearned reaction to a stimulus.

Horripilation and physiological reaction are semantically related. Sometimes you can replace term "Horripilation" with "Physiological reaction", this terms are similar.