WordNet sense 1 (the feeling of distress and disbelief that you have when something bad happens accidentally):

daze, stupor

WordNet sense 2 (an instance of agitation of the earth's crust):

seismic disturbance

WordNet sense 3 (an unpleasant or disappointing surprise):

blow

WordNet sense 4 (a mechanical damper; absorbs energy of sudden impulses):

cushion, shock absorber

WordNet sense 5 (strike with disgust or revulsion):

appal, appall, offend, outrage, scandalize, scandalise

WordNet sense 6 (surprise greatly; knock someone's socks off):

floor, stun, ball over, blow out of the water, take aback

WordNet sense 7 (the violent interaction of individuals or groups entering into combat):

impact

WordNet sense 8 (a reflex response to the passage of electric current through the body):

electric shock, electrical shock

WordNet sense 9 (inflict a trauma upon):

traumatize, traumatise