1) Act frightened 2) Act intimidated 3) Act like a scaredy-cat 4) Act the scaredy-cat 5) Be intimidated 6) Behave cravenly 7) Bend 8) Betray fear 9) Cringe 10) Cringe away from a bully 11) Cringe down in fear 12) Cringe in fear 13) Crouch 14) Crouch down in fear 15) Crouch in fear 16) Crouch or curl up Found on https://www.crosswordclues.com/clue/cower
• (v. i.) To stoop by bending the knees; to crouch; to squat; hence, to quail; to sink through fear. • (v. t.) To cherish with care. Found on http://thinkexist.com/dictionary/meaning/cower/
[Verb] To crouch or move backwards because of fear. Example: I saw the small dog cower in the corner as his owner shouted at him.
Found on http://www.bbc.co.uk/skillswise/glossary/