Synonyms of flabbergasted

adjectiveAppalled, annoyed, exhausted or disgusted.

• amazedAstonished or confounded with fear, surprise, or wonder; greatly surprised (often with ensuing adpositions e.g. at...
• astonishedAmazed; surprised.
• astoundedSurprised, amazed, astonished or bewildered.
• awed
• awe-struck
• bemused
• bowled over
• deer in the headlights
• dumbfoundedShocked and speechless.
• flabagasted
• flambergasted
• flambusteredWorried or confounded; flabbergasted.
• floored
• flummoxedConfused, perplexed or flustered.
• gobsmackedFlabbergasted, astounded, speechless, overawed.
• mystifiedPuzzled or confused.
• overawedImpressed or convinced by someone to an unreasonable degree, sometimes with an implication of gullibility.
• overwhelmed
• shocked
• slack-jawed
• speechless
• startledSurprised and slightly frightened.
• stunnedUnable to act or respond; dazed; shocked.
• stupefied
• surprisedCaused to feel surprise, amazement or wonder, or showing an emotion due to an unexpected event.
• taken aback
• thunderstruckAstonished, amazed or so suddenly surprised as to be unable to speak.
• unnervedDeprived of courage, strength, confidence, self-control, etc.
• wide-eyed