The term 'Shrink Back in Fear' can be summarized by two crossword solutions: RECOIL (6 letters) and COWER (5 letters). RECOIL is an instinctive reaction to a sudden stimulus, such as fear or pain, where the body moves away quickly. COWER is a physical posture of fear, where a person crouches down and draws their limbs close to their body. Both of these reactions are common responses to fear, and are often seen in animals and humans alike.