surprise

[1]	shock , astound , astonish , amaze , disconcert , nonplus , dumbfound/dumfound , stagger , take aback , strike , hit , (Colloq) floor , bowl over , flabbergast , rock/set (someone) back on his/her/(Mainly Brit) their heels , (Brit) knock (someone) for six , (US) knock (someone) for a loop
[2]	take/catch unawares , catch red-handed/in the act/in flagrante delicto , catch napping/off guard , discover
[3]	storm

[1]	shock , surprisal , astonishment , amazement , stupefaction , wonder , incredulity
[2]	blow , jolt , shocker , bolt from/(US) out of the blue , bombshell , eye-opener