gobsmacked

As an interjection blimey

is (uk|australia|new zealand).

As an adjective gobsmacked is

(chiefly|british|slang) flabbergasted, astounded, speechless, overawed.

In chiefly|british|slang|lang=en terms the difference between gobsmacked and gobsmacked

is that gobsmacked is (chiefly|british|slang) flabbergasted, astounded, speechless, overawed while gobsmacked is (chiefly|british|slang) flabbergasted, astounded, speechless, overawed.

As adjectives the difference between gobsmacked and gobsmacked

is that gobsmacked is (chiefly|british|slang) flabbergasted, astounded, speechless, overawed while gobsmacked is (chiefly|british|slang) flabbergasted, astounded, speechless, overawed.

As an adjective gobsmacked

is (chiefly|british|slang) flabbergasted, astounded, speechless, overawed.

As a verb overwhelmed is

(overwhelm).

As an adjective gobsmacked

is (chiefly|british|slang) flabbergasted, astounded, speechless, overawed.

As a verb traumatised is

(traumatise).

As adjectives the difference between gobsmacked and petrified

is that gobsmacked is (chiefly|british|slang) flabbergasted, astounded, speechless, overawed while petrified is extremely afraid.

As a verb petrified is

(petrify).

As adjectives the difference between awestruck and gobsmacked

is that awestruck is filled or overcome with awe or wonder while gobsmacked is (chiefly|british|slang) flabbergasted, astounded, speechless, overawed.

As adjectives the difference between gobsmacked and bewildered

is that gobsmacked is flabbergasted, astounded, speechless, overawed while bewildered is baffled, confused, mystified, at a loss, or uncertain.

As a verb bewildered is

past tense of bewilder.

As a verb bamboozled

is (bamboozle).

As an adjective gobsmacked is

(chiefly|british|slang) flabbergasted, astounded, speechless, overawed.

As adjectives the difference between gobsmacked and surprised

is that gobsmacked is flabbergasted, astounded, speechless, overawed while surprised is caused to feel surprise, amazement or wonder, or showing an emotion due to an unexpected event.

As a verb surprised is

past tense of surprise.

As adjectives the difference between gobsmacked and surprise

is that gobsmacked is flabbergasted, astounded, speechless, overawed while surprise is unexpected.

As a noun surprise is

something not expected.

As a verb surprise is

to cause (someone) to feel unusually alarmed or delighted.